What the figures prove — page 3
Topology
9 families
euler-solid
85 kinds of claim · 29 placements
- in dimension 1 the sum is 1 − (−1)^d ×8
- the alternating sum of the 5-cell is 0 ×5
- cyclic, 6 corners: cells = edges − corners ×4
- cyclic, 6 corners: faces = 2 × (edges − corners) ×4
- cyclic, 6 corners: the alternating sum is 0 ×4
- 5-cell: cells = edges − corners ×3
- 5-cell: faces = 2 × (edges − corners) ×3
- 5-cell: the alternating sum is 0 ×3
- V − E + F is 0 for this solid ×3
- the whole boundary of the 3-cube has alternating sum 1 − (−1)^3 ×2
- a honeycomb on the torus has V − E + F = 0
- a spanning tree has one fewer edge than the graph has vertices
- and 720° is 360° times V − E + F
- and its twelve edges
- and six sides to every face
- between one and three holes are punched
- each unfolded face closes back on the corner
- every edge lies between exactly two faces
- every edge of the cube is shared by two faces
- every edge of the dodecahedron is shared by two faces
- every edge of the icosahedron is shared by two faces
- every edge of the octahedron is shared by two faces
- every edge of the surface is shared by exactly two faces
- every edge of the tetrahedron is shared by two faces
- every partial boundary before the last facet sums to 1
- no leftover edge closes a loop among the faces
- the alternating sum is not 2, on a solid with flat faces and straight edges
- the alternating sum of the tesseract is 0
- the counts obey Euler's formula
- the cube's faces fall short of hexagons by exactly 12
- the defects on the cube come to 720°
- the defects on the dodecahedron come to 720°
- the defects on the icosahedron come to 720°
- the defects on the octahedron come to 720°
- the defects on the tetrahedron come to 720°
- the dodecahedron's faces fall short of hexagons by exactly 12
- the faces at a corner of the cube do not close up flat
- the faces at a corner of the dodecahedron do not close up flat
- the faces at a corner of the icosahedron do not close up flat
- the faces at a corner of the octahedron do not close up flat
- the faces at a corner of the tetrahedron do not close up flat
- the faces short of six sides fall short by 12 in all
- the flattened cube keeps its eight corners
- the flattened cube still gives 2
- the hexagonal prism's faces fall short of hexagons by exactly 12
- the leftover edges are what the tree did not use
- the leftover edges join every face to every other
- the leftover edges number one fewer than there are faces
- the mode is one the family draws
- the solid is one of the five regular ones
- the solid is one the family builds
- the tesseract has 32 edges
- the tesseract's counts are the 16-cell's, reversed
- the tetrahedron's faces fall short of hexagons by exactly 12
- the tree is grown from one of the graph's own vertices
- the tree reaches every vertex
- the triangular prism's faces fall short of hexagons by exactly 12
- the truncated icosahedron's faces fall short of hexagons by exactly 12
- the truncated octahedron's faces fall short of hexagons by exactly 12
- the truncated tetrahedron's faces fall short of hexagons by exactly 12
- the two trees together use every edge exactly once
- three edges at every corner
- three faces meet at every corner of the cube
- three faces meet at every corner of the dodecahedron
- three faces meet at every corner of the hexagonal prism
- three faces meet at every corner of the tetrahedron
- three faces meet at every corner of the triangular prism
- three faces meet at every corner of the truncated icosahedron
- three faces meet at every corner of the truncated octahedron
- three faces meet at every corner of the truncated tetrahedron
- V − E + F = 2 for the cube
- V − E + F = 2 for the dodecahedron
- V − E + F = 2 for the hexagonal prism
- V − E + F = 2 for the tetrahedron
- V − E + F = 2 for the triangular prism
- V − E + F = 2 for the truncated icosahedron
- V − E + F = 2 for the truncated octahedron
- V − E + F = 2 for the truncated tetrahedron
- V − E + F is -2 for this solid
- V − E + F is 2 for the cube
- V − E + F is 2 for the dodecahedron
- V − E + F is 2 for the icosahedron
- V − E + F is 2 for the octahedron
- V − E + F is 2 for the tetrahedron
- which is V − E + F = 2
fixed-point
123 kinds of claim · 55 placements
- globe 11 has an odd number of agreeing pairs ×10
- χ(K(4, 1)) is n − 2k + 2 ×8
- removing any vertex of SG(5, 2) lets 2 colours suffice ×6
- the stable graph SG(5, 2) needs as many colours as K(5, 2) ×6
- the shortest odd cycle in K(5, 2) has length 5 ×4
- at 6 × 6 the boundary condition holds ×3
- at 6 × 6 there is a complementary edge ×3
- every necklace can be shared by 3 thieves with 4 cuts ×3
- some necklace needs all 4 cuts ×3
- 3 colours do not suffice
- 3 to 30 region centres
- a degree from 1 to 5
- a seed from 1 to 999
- a triangle without opposite labels does not wind
- a two-by-two bimatrix
- all 1,024 antipodal labellings of the 2 × 2 grid were tried
- an even grid of at most 40 cells a side
- and at those mixtures the two pure replies pay exactly the same
- and has no direction to choose there
- and it breaks the boundary condition
- and it is inside the disc
- and it lies inside the disc
- and it sits exactly on the rim
- and its equator winds an odd number of times
- and second
- and sits on it
- and some necklace needs all of them
- and the crossing found is a genuine zero
- and the rule with the hole has none, at any of the sampled points
- and the second
- and the sweep finds points that barely move, near it
- at each pair both readings agree to nine decimal places
- at the left end the map moves the point right or not at all
- at the right end it moves it left or not at all
- between 4 and 16 globes
- between 8 and 120 arrows are drawn per panel
- both choosers have a mixture of the other's that leaves them indifferent
- dipole has the index it claims
- each region reaches arccos(1/3) from its centre
- each set is swept at between 200 and 20,000 points
- every agreeing point comes with its opposite point
- every arrow is tangent to the sphere
- every necklace can be shared fairly with no more cuts than colours
- every one of them has a complementary edge
- every open half-circle holds at least two of the points
- every orbit runs into the fixed point
- every outer vertex has an inner partner
- every sampled antipodal labelling has a complementary edge
- exactly one cut falls inside the blue block
- exactly one cut falls inside the green block
- exactly one cut falls inside the orange block
- exactly one cut falls inside the purple block
- few enough arrangements to check every one
- half a turn along the equator reverses the difference exactly
- in both of its readings
- no boundary edge is itself complementary in the labelling drawn
- no face region of the tetrahedron holds a point together with its opposite point
- no point of a ring, turned stays where it is, and none comes close
- no point of the whole plane, shifted stays where it is, and none comes close
- one of the two has convex values and the other does not
- opposite boundary vertices carry opposite labels
- random fields without the boundary condition often escape
- saddle has the index it claims
- so both values are within one step's change of zero
- so every direction is marked by some colour
- so every point of the open disc moves
- so it has opposite signs at the two ends of a half turn
- so the sweep crosses zero at least twice
- so the winding must be carried by triangles holding opposite labels
- some direction and its opposite are marked by the same colour
- some edge joins a label to its negative
- some half-circle holds fewer than two points
- some necklace of these beads needs as many cuts as there are colours
- some region holds a point together with its opposite point
- source has the index it claims
- the annulus is turned by between 5 and 175 degrees
- the boundary winds an odd number of times round the diamond
- the colouring is proper
- the control's fixed point is fixed, first coordinate
- the convex-valued rule has a point inside its own value
- the difference reverses sign between opposite points
- the equator's difference winds an odd number of times
- the fairest division of this necklace uses one cut per colour
- the farthest complementary edge from a zero gets closer as the grid is refined
- the field has a zero in the square
- the field is one the figure knows
- the field vanishes at the pole
- the fixed point is unique
- the grouped necklace needs one cut for every colour
- the halving map does have a fixed point
- the imbalance changes sign somewhere in half a turn
- the line halves the first shape
- the map is one the figure knows
- the map keeps the interval inside itself
- the map sends the disc into itself
- the opposite pairs where both readings agree are odd in number
- the pair found really does take the same value
- the point found really is fixed
- the ring is turned by between 5 and 175 degrees
- the row chooser's best reply is one of the two rows
- the smallest-element colouring is proper
- the solved point is fixed, first coordinate
- the solved point is fixed, second
- the step and the gap are the same rule away from the jump
- the sweep takes between 36 and 2000 samples
- the sweep takes between four hundred and twenty thousand samples
- the two sets found are disjoint — a monochromatic edge
- the two shapes cut have between 3 and 12 sides each
- the view is one the family draws
- thief A gets half the blue beads
- thief A gets half the green beads
- thief A gets half the orange beads
- this labelling has no complementary edge
- three colours do
- turning the line through half a turn reverses the imbalance
- two colours do not suffice
- two colours never suffice
- two correspondences the family knows are compared
- two cuts give thief A exactly half of each colour
- two to four colours with an even number of beads each
- values in opposite cones make an angle of at least a right angle
- which the open disc does not contain
- without the boundary condition some labellings have no complementary edge
gluing
97 kinds of claim · 48 placements
- enumeration and recurrence agree at n 1, genus 0 ×15
- a sphere with 3 cross-caps has characteristic -1 ×3
- the enumeration agrees with Harer–Zagier at genus 0 ×3
- a surface with 2 handles has characteristic -2 ×2
- the classification is drawn up to 3 of them in this view ×2
- a drawn random gluing has 6 to 60 edges
- a non-orientable surface and an orientable one share the characteristic and differ
- a pairing makes a sphere exactly when no two chords cross
- a sphere has characteristic 2
- a sphere with 1 cross-cap has characteristic 1
- a sphere with 2 cross-caps has characteristic 0
- a torus has characteristic 0
- aba⁻¹b⁻¹ gives the characteristic of a torus
- aba⁻¹b⁻¹ has the Euler characteristic a torus has
- aba⁻¹b⁻¹ is orientable
- abab gives the characteristic of a projective plane
- abab has the Euler characteristic a projective plane has
- abab is not orientable
- abab⁻¹ gives the characteristic of a Klein bottle
- abab⁻¹ has the Euler characteristic a Klein bottle has
- abab⁻¹ is not orientable
- abb⁻¹a⁻¹ has the Euler characteristic a sphere has
- abb⁻¹a⁻¹ is orientable
- an orientable pairing has a whole, non-negative genus
- and every face to a face
- and no edge to itself
- and no face to itself
- and no vertex is its own opposite, so the map moves every point
- and so is the sidedness
- and ten faces
- and the quotient's is a projective plane's
- and thirty edges
- and twenty faces
- at least one move applies to the word given
- between one and five cross-caps are drawn
- between one and five gluings are drawn side by side
- between three and twelve steps are drawn
- between two and four words, each of at least three edges
- capping the boundaries gives a closed surface with characteristic at most two
- each drawn pairing is glued head to tail
- edge a is glued to exactly one other edge
- edge b is glued to exactly one other edge
- edge c is glued to exactly one other edge
- edge d is glued to exactly one other edge
- edge e is glued to exactly one other edge
- edge f is glued to exactly one other edge
- every pairing is drawn for polygons of 4 to 8 edges
- every sampled vertex count has the parity the genus formula allows
- every vertex has its opposite among the vertices
- few enough vertices to colour each one differently
- fifteen edges
- genus 0 is the Catalan number
- no letter appears more than twice
- no move raises the measure
- no two of the surfaces share a characteristic
- one vertex, for even n, is 1/(n + 1)
- one-vertex gluings are 1/(n + 1) of all
- the antipodal map carries every edge to an edge
- the camera angles are numbers
- the census runs to between 6 and 24 edges
- the characteristic is unchanged by the cancel move
- the characteristic is unchanged by the collapse move
- the characteristic is unchanged by the crosscap move
- the characteristic is unchanged by the pair move
- the cover's characteristic is twice the surface's, because every cell is doubled
- the cycle count agrees with the pooled corners
- the drawing scale is sane
- the drawn range reaches at least one characteristic that both sides hold
- the drawn vertex counts hold nearly all of the distribution
- the genera share out all (2n − 1)!! pairings
- the icosahedron has twelve vertices
- the icosahedron's characteristic is a sphere's
- the mean vertex count sits just above the harmonic number H(2n), by less than 1/n
- the name follows from the number
- the name follows from the two numbers
- the orientable row is on or off
- the pairings number (2n − 1)!!
- the polygon has an even number of edges
- the quotient has six vertices
- the recurrence divides exactly
- the reduction reaches a standard form
- the sample mean sits within four standard errors of the exact mean
- the sphere's share is Catalan over (2n − 1)!!
- the spheres are the Catalan number
- the standard form names the surface the original word named
- the table runs to between 3 and 10 pairs
- the two numbers name the surface without anything else being consulted
- the two surfaces with the same characteristic are told apart by orientability
- the view is one the family draws
- the word aab leaves at least one edge unpaired
- the word abab⁻¹c leaves at least one edge unpaired
- the word abc leaves at least one edge unpaired
- the word abcb⁻¹ leaves at least one edge unpaired
- the word glues every edge to exactly one other
- the word has at least four edges
- the words drawn give different triples, so the figure is separating them
- three fresh letters are available for the collapse
knot
88 kinds of claim · 44 placements
- the Borromean rings: the diagram's count and Gauss's integral agree for components 1 and 2 ×3
- the figure-eight knot: 3 colours are available exactly when 3 divides its determinant ×3
- the figure-eight knot: the count with 3 colours ×3
- the trefoil: 3 colours are available exactly when 3 divides its determinant ×3
- the trefoil: the count with 3 colours ×3
- the unknot: 3 colours are available exactly when 3 divides its determinant ×3
- the unknot: the count with 3 colours ×3
- three rings in a chain: the diagram's count and Gauss's integral agree for components 1 and 2 ×3
- a colouring is drawn on a diagram that has crossings
- a colouring uses three, five or seven colours
- a crossing joins two different Seifert circles
- a diagram with k crossings is cut into k arcs
- a loop that dips through and back: punctures and crossings agree
- a loop that dips through and back: the diagram's count and Gauss's integral agree for components 1 and 2
- and Gauss's integral, which sees no disc at all, gives it too
- and one whose linking number is bigger than one
- and the one found uses all three
- and their signs add to an even number
- and they reach zero in two different ways — one with no punctures, one with two that cancel
- at every crossing the three arcs are all alike or all different
- at least two of the links have linking number zero
- between three and five deformation sizes, none of them large
- between two and four links the family knows
- each crossing has exactly one of its two strands going underneath
- every row of the matrix vanishes at t = 1, as a presentation of a knot must
- few enough circles to try every ordering
- following the smoothing from a segment comes back to that segment
- knots sharing a determinant are told apart by the polynomial
- no single arc passes over every crossing
- one boundary circle, so the genus is (1 − χ)/2
- the (2, 4) torus link: the diagram's count and Gauss's integral agree for components 1 and 2
- the cinquefoil admits a colouring using more than one of the 5 colours
- the cinquefoil has the crossings it claims
- the cinquefoil takes ± its determinant at θ = π
- the cinquefoil takes the value 1 at θ = 0
- the cinquefoil: |Δ(−1)| is the determinant
- the cinquefoil: on an alternating diagram the two bounds agree
- the constant colourings are always allowed, so there are at least p
- the discs and bands form one connected surface
- the figure-eight knot admits a colouring using more than one of the 5 colours
- the figure-eight knot has the crossings it claims
- the figure-eight knot takes ± its determinant at θ = π
- the figure-eight knot takes the value 1 at θ = 0
- the figure-eight knot: |Δ(−1)| is the determinant
- the figure-eight knot: on an alternating diagram the two bounds agree
- the first component of this link is a flat circle, so its disc is the obvious one
- the Hopf link: punctures and crossings agree
- the Hopf link: the diagram's count and Gauss's integral agree for components 1 and 2
- the knot is one the family draws, with crossings
- the knot is one the figure knows
- the knots in the table have different determinants
- the link is one the family knows
- the linking number is the same at every deformation
- the minor is not zero
- the polynomial at t = −1 is the determinant found from the colourings
- the polynomial is symmetric — the same read backwards
- the polynomial takes the value ±1 at t = 1
- the polynomial's bound never exceeds the surface's genus
- the punctures added with signs give the linking number
- the seven-crossing torus knot has the crossings it claims
- the seven-crossing torus knot: |Δ(−1)| is the determinant
- the seven-crossing torus knot: on an alternating diagram the two bounds agree
- the strand is broken where it goes underneath, not somewhere else
- the surface's Euler characteristic gives a whole genus
- the table contains a link whose components cross and whose linking numbers are all zero
- the table is ordered by crossing number
- the table's columns are small primes
- the trefoil admits a colouring in more than one colour
- the trefoil admits a colouring using more than one of the 3 colours
- the trefoil has the crossings it claims
- the trefoil is three arcs
- the trefoil takes ± its determinant at θ = π
- the trefoil takes the value 1 at θ = 0
- the trefoil: |Δ(−1)| is the determinant
- the trefoil: on an alternating diagram the two bounds agree
- the two computations agree at this deformation
- the two loops stay clear of each other at every amplitude
- the two strands at a crossing are not parallel
- the unknot is a single arc
- the view is one the family draws
- there are nine three-colourings of the trefoil in all
- there are three moves, and Reidemeister proved there are no others
- twice the over-strand equals the two under-strands added, at every crossing
- two circles side by side: punctures and crossings agree
- two circles side by side: the diagram's count and Gauss's integral agree for components 1 and 2
- two closed curves cross an even number of times
- two or three links whose first component is a flat circle
- while the number of crossings is not
loops
161 kinds of claim · 81 placements
- rows 0 and 1 of the character table are orthogonal ×42
- on the 1-sheeted cover, the lift of a loop winding 0 times closes exactly when it should ×24
- generator 1 acts as a permutation of the 3 sheets ×14
- point 1's entry is a permutation of the 4 sheets ×13
- edge 1's entry is a permutation of the 3 sheets ×10
- the rank comes out at 1 + 3(2 − 1), which is the index times one less than the rank below ×9
- a loop winding 0 times lifts to a closed path exactly when 0 is a multiple of 3 ×7
- rows 0 and 0 of the character table are normalised ×7
- the class sizes of S2 add to its order ×4
- vertex 1 has at most one a leaving it ×4
- vertex 1 has at most one b leaving it ×4
- face 1 closes up on its own sheet ×3
- the loop drawn for class 0 is a whole number ×3
- 4 sheets, two 4-cycles and a double swap: the character sum and the enumeration agree ×2
- the loop drawn for class -2 is a whole number ×2
- 2 sheets, four swaps: the character sum and the enumeration agree
- 3 sheets, three 3-cycles: the character sum and the enumeration agree
- 4 sheets, three double swaps: the character sum and the enumeration agree
- 4 sheets, two double swaps and a 3-cycle: the character sum and the enumeration agree
- a class on the torus is a pair of whole numbers, not both zero
- a free group of rank two has four words of length one
- a spanning tree of a connected graph has one edge fewer than it has vertices
- and are not under the other one
- and at most one arriving
- and at the same height
- and by the end the loop has been dragged through the hole
- and consecutive ones differ by exactly one turn
- and every list that is not realised passes the count and the parity anyway
- and exactly one arriving
- and in the second, so it closes up on the torus
- and inside the outer boundary
- and it goes round each hole a net zero times
- and its degree is even
- and its degree is odd
- and on exactly two, once in each direction
- and the answer is a whole number, as a count of lists must be
- and the losses add to an even number, as the sign of a product of permutations forces
- and the same word cancels to nothing on the wedge, where it stays four letters long
- and the top and bottom as many times as its second
- and their number divides the number of sheets
- and they are those multiples in order
- and twelve of length two
- between one and five words to be refused
- between one and four generator words in a, b and their inverses
- between three and six of the shape lists the family knows are tabulated
- between two and eight branch points
- between two and five sheets
- between two and six sheets
- both loops start at the same point of the ring
- carrying the loop along either path leaves its class alone
- each loop on the torus is a pair of whole numbers, not both zero
- each shape names a conjugacy class of the group
- each sheet has exactly one edge of each label leaving it
- every branch point's cycles fit side by side inside its column
- every cover's counted rank matches the formula
- every lifted edge appears on some face
- every marked point actually branches
- every point of the fibre projects onto the marked point of the circle
- every sheet is reached by some word, so the cover is connected
- going round all the branch points returns every sheet, so this is a covering of the sphere
- going round the face returns every sheet to itself, so the permutations describe a covering
- in the disc every stage of the shrink stays inside
- no sample of the loop lands on the point it is wound about
- no step of the walk turns more than a quarter of a turn
- no two cycles drawn in one lane overlap
- no two deck transformations agree on the base vertex
- one permutation for each of the 2g edges
- over the line, the only loop that lifts to a loop is the one that goes nowhere
- running one loop then the other adds the counts
- so the two maps are not the same map
- so the whole fibre sits over one point
- so there are at most as many symmetries as sheets
- the a's in the word add up to the winding number about that hole
- the b's in the word add up to the winding number about that hole
- the base circle itself does not lift to a loop
- the bouquet below has two or three circles
- the bouquet has between one and four circles
- the bouquet has two to four circles
- the cells count what the Riemann–Hurwitz formula says
- the character sum and the enumeration agree
- the character table of this symmetric group is one the family carries
- the classes drawn are whole numbers no bigger than four
- the classes that lift to loops are the multiples of the sheet count
- the commutator does not cancel down any further
- the commutator has exponent sum zero in the first generator
- the composition of two deck transformations is one
- the cover has between two and five sheets
- the cover has between two and four sheets
- the cover has genus d(g − 1) + 1
- the cover is connected, so its deck group acts on one object
- the cover is connected, so the index argument applies
- the cover is connected, so the sheets are one orbit
- the cover's Euler characteristic is even, as a closed orientable surface's must be
- the covering is one of torus, genus2, cuberoot, power, simple
- the curve about the left hole is a whole number
- the curve about the right hole is a whole number
- the degree of the map that is not odd is a whole number
- the degree of the odd map is a whole number
- the disc lifts to one face on every sheet
- the drawing shows between two and five turns
- the edges outside the tree are exactly the free generators the graph carries
- the Euler characteristic is that of a closed orientable surface
- the Euler characteristic multiplies by the number of sheets
- the first loop is a whole number
- the first map really does send opposite points to opposite points
- the folded graph has at least one independent loop
- the free group outgrows the abelian group of the same rank
- the generator aa is accepted by the folded graph
- the generator ab is accepted by the folded graph
- the generator abab is accepted by the folded graph
- the generator abaB is accepted by the folded graph
- the generator ba is accepted by the folded graph
- the generator bb is accepted by the folded graph
- the hole is between a fifth and three fifths of the ring
- the identity is a deck transformation
- the index of the subgroup is the number of sheets
- the lift ends a whole number of turns above where it started
- the loop at p is a whole number
- the loop being lifted is a whole number
- the loop drawn at p has the class claimed
- the loop drawn for a class really has that class
- the loop lifted goes round between one and four times
- the loop lifted is the one asked for
- the loop lifted winds between zero and six times
- the loop stays clear of the hole
- the loops composed have counts no bigger than three
- the loops tabulated wind between zero and eight times
- the marked point is on the base circle
- the monodromy table is drawn over two generators
- the number of sheets is what one lap advances by
- the path crosses the side edges as many times as its first count says
- the permutations connect every sheet to every other
- the permutations reach every sheet from every other, so the covering is connected
- the printed terms add to the printed answer
- the probe's two images are exactly opposite under the odd map
- the second loop is a whole number
- the second map does not, which is what makes it a control
- the shape list is one the family knows
- the shrink is legal to begin with and stops being legal
- the slide is drawn in three to five stages
- the surface has genus 1, 2 or 3
- the symmetries reach every sheet exactly when there are as many of them as sheets
- the table holds a list that is realised and a list that is not
- the table runs to between three and six sheets
- the table runs to between two and six sheets
- the two run one after the other is a whole number
- the two squares never overlap during the slide
- the view is one the family draws
- the winding number is a whole number
- the word a is refused
- the word aa is refused
- the word ab is refused
- the word b is refused
- the word is one this family realises
- the word read off the curve is the word the curve was built from
- the words that come back are closed under composition
- two or three circles below
- two words land on the same sheet exactly when one undoes the other into the subgroup
- while a word that really is trivial reduces away, so the test can fail
- with the last point's permutation removed, going round no longer returns every sheet
- words of length up to two to four are listed
mobius
16 kinds of claim · 16 placements
- and between 24 and 140 the long way
- between none and sixteen cross-sections are outlined
- between three and nine frames are drawn along the band
- carrying the surface round once brings it back on the other face
- going once round the long way returns to the point with the cross-section reversed
- going once round the tube returns to the same point
- the band is drawn at a whole number of half-twists
- the frame comes back the same size — only its sense can change
- the frame returns with a reversed sign exactly when the band is one-sided
- the gluing arrow matches the twist the figure is about
- the mesh is between 16 and 96 round the tube
- the self-intersection circle is on or off
- the tube's distance from the axis leaves the figure-eight room to close
- the view is one the family draws
- u = 0 and u = π are two different places on the surface and one place in space
- which is not the same point unless it is one the reversal fixes
mobius-cut
3 kinds of claim · 4 placements
- and one lap leaves one loop while two laps leave two
- the cut is inside the band
- the scissors take one lap down the middle and two off-centre
parity
66 kinds of claim · 28 placements
- none of the 594 pairs of non-neighbouring edges meet ×5
- a pair of horns at stage 1 is clasped, of linking number ±1 ×4
- stage 3 has 2^3 − 1 clasped pairs ×4
- ear clipping: a polygon of 20 corners is cut into 18 triangles ×2
- the image triangulation: a polygon of 20 corners is cut into 18 triangles ×2
- the source triangulation: a polygon of 20 corners is cut into 18 triangles ×2
- a line with a point removed falls into two pieces
- a plane with a line removed falls into two pieces
- a plane with a point removed stays in one piece
- a triangulation of a polygon has one diagonal fewer than it has triangles
- all 16 rays agree on the parity
- and a ray from the centre crosses it an even number of times
- and both insides keep a substantial part of the frame
- and is not linked with that horn's partner
- and the clasp shows as at least two crossings of the projection
- and the steepest chord anywhere grows geometrically as the scale shrinks
- and they disagree on the count, which is the point
- at every angle tried the chords steepen by more than fifteenfold over the scales measured
- between 2 and 36 rays are drawn
- consecutive squares in the visiting order are neighbours
- each square's side is at most 2⁻ⁿ, so the diameters go to zero
- ear clipping: no two triangles overlap
- ear clipping: the triangles account for exactly the polygon's own area
- every cell of the grid is visited exactly once
- every direction gives the same parity
- every direction of ray gives the same verdict at this point
- every simple polygon of four or more corners has an ear to clip
- halving the pitch more than halves the largest disc that fits
- horns from different clasps are not linked with each other
- no two of the kept squares overlap
- some sampled point is inside the curve
- space with a line removed stays in one piece
- the arms of the spiral are between 22 and 70 units apart
- the clipping terminates
- the counts themselves differ, which is why the parity is the claim
- the curve goes twice round its own centre
- the disc drawn touches no edge of the curve
- the drawn ray crosses the surface more than once
- the five-pointed loop crosses itself five times
- the horns shrink geometrically, so their tips converge
- the image triangulation: no two triangles overlap
- the image triangulation: the triangles account for exactly the polygon's own area
- the infinite product is bounded away from zero
- the kept area is the product of the stages' own factors
- the loop drawn goes once round one horn
- the magnification of the second panel is between 3 and 27
- the marked point is inside the frame, given as fractions of it
- the number of stages drawn is between 1 and 4
- the number of stages of horns is between 1 and 4
- the number of terms summed is between 2 and 6
- the outside point is clear of the tube
- the plane comes apart into exactly two pieces, no more and no fewer
- the point is put inside or outside
- the radius stays positive, so no two angles share a point
- the resolution of the flood fill is between 24 and 90
- the sample grid is between 8 and 40 columns
- the sampled inside agrees with the polygon's own area to within six per cent
- the second corridor is the narrower one
- the source triangulation: no two triangles overlap
- the source triangulation: the triangles account for exactly the polygon's own area
- the spiral turns between 1 and 6 times
- the terms roughen faster than they shrink
- the tube is closed up out of two triangles per patch
- the two triangles either side of a diagonal send a point on it to the same place
- the view is one the family draws
- two pitches, both inside the range the family draws
stereographic
34 kinds of claim · 36 placements
- the image of 0 lies on the circle ×14
- the ray to 0 passes through the pole ×14
- the image of -2 lies on the circle ×13
- the ray to -2 passes through the pole ×13
- a circle missing the pole projects to a circle, to within a fitted residual
- a circle through the pole projects to a straight line
- and no two of them meet
- and the south chart does have one there
- at least two finite points are carried across the projection
- between 2 and 24 rays are drawn — one ray is not a correspondence
- between a hundred and four thousand points checked
- between three and seven fibres, each at a latitude strictly inside the sphere
- dim and rays are read by the ray views alone
- each fibre lies on the unit three-sphere
- each transformation is normalised to determinant one
- every patch has the same area on the sphere
- every two fibres are linked exactly once, counted from the drawn curves
- nearly every sample lay in the overlap
- none of the circles in this list passes through the pole
- only the parabolic map has a repeated fixed point
- the crossing angle is the same on the sphere and in the plane
- the fitted transformation is invertible
- the image is on the ray from the pole through the point
- the image lands on the plane
- the north chart has no value at its own pole
- the projected patches are wildly unequal even though the originals are equal
- the projection is drawn from a circle or from a sphere
- the rotation, read in the plane, is exactly the fitted Möbius transformation
- the three chosen points determine the transformation
- the trace classifies the transformation as the label claims
- the two charts differ by the reciprocal at every point of the overlap
- the two charts miss different points
- the view is one the family draws
- there are pairs to link
Probability
10 families
bayes
42 kinds of claim · 25 placements
- a halfer told it is the first day moves above one half
- a thirder told it is the first day comes back to one half
- and at seven days it is 13/27
- and at three doors it is two thirds
- and the boy–boy block holds 2d − 1 of them
- at one awakening every account agrees on one half
- everybody has it, so everybody positive has it
- nobody has it, so nobody who tests positive has it
- one of the two strategies wins, and only one
- one ticket a run is fair at one half
- one ticket an awakening is fair at 1/(wakes + 1)
- prior is a probability, between 0 and 1
- specificity is a probability, between 0 and 1
- staying wins as often as the first pick was right
- switching gets better with more doors
- switching wins two thirds against a host who knows, and half against one who does not
- tails brings between 1 and 8 awakenings
- the answer falls as the detail becomes commoner
- the answer rises with the base rate
- the asked families settle near 1/3
- the awakenings settle near one share in wakes + 1
- the count is the formula (2 − p)/(4 − p)
- the curve agrees with the grid count
- the formula is the kept area
- the four cells fill the square
- the game needs at least three doors
- the halfer's square gives heads one half
- the ignorant host's story throws two of the six worlds away
- the ignorant-host variant is only drawn at three doors, where switching has one meaning
- the kept area gives the protocol's answer
- the marked row and column share one cell
- the met-a-child families settle near 1/2
- the only news drawn is that it is the first day
- the question is any, older or met
- the runs settle near one half
- the shaded fraction is Bayes' theorem
- the thirder's square gives heads one share in wakes + 1
- the trait takes between 1 and 12 values
- the two curves are mirror images about one half
- the two strategies exhaust the possibilities
- the view is one of sweep, monty, monty-scale, children, tuesday, trait, mention, children-sim, beauty, beauty-sim, beauty-bets, beauty-many
- the worlds fill the square
birthday
57 kinds of claim · 29 placements
- the near-birthday chance at k = 0 is a distinct-birthday chance on a shorter year ×7
- 22 is still under a half
- 23 is over it
- a block is between 2 and 365 days
- a group smaller than the calendar
- a match within a day needs 14
- a seasonal swing is between nothing and the whole mean
- a spike holds more than its fair share and less than everything
- a tail and a cycle short enough to draw
- a weekend day is thinned, not removed or boosted
- an exact match needs 23 people
- an uneven calendar has at most as many effective days as it has days
- and its mean length is within ten per cent of √(πp/2)
- and no calendar needs a bigger room than the even year
- and the threshold only falls
- and where it misses, the calendar needs one MORE person than its effective days predict, never one fewer
- at the last step the two agree modulo the factor found
- before the last step they agree modulo neither prime
- between 4 and 24 slots, every one possible
- evening the two days raises the chance that nobody matches
- every product was split
- n is a product of two primes
- n is a whole number below a trillion
- nobody is alone at 3,064
- nobody is alone in a room of 3,064, more likely than not
- one person shares with nobody
- somebody shares at 23
- the chance of a match only rises as the calendar grows more uneven
- the curve bends downward
- the curve is symmetric about the even split
- the day-probabilities add to one
- the effective number of days places the threshold within one person
- the even year's threshold is 23
- the expected number of loners peaks when the room is as large as the year
- the half-way point is 23 people
- the highest point is the even split
- the last new value leads back into the cycle
- the modulus is a prime of at most 5000
- the pair count is k choose 2
- the sample holds the primes asked for
- the search ends with a proper factor within forty steps
- the second differences are constant, so the curve is a parabola
- the simulation agrees with the exact walk
- the simulation agrees with the formula
- the steps grow as roughly the square root of the smaller prime
- the sweep is seasonal or weekly
- the sweep starts at the even year
- the symmetric-polynomial count agrees with the product on an even year
- the three thresholds come in this order
- the threshold follows the square-root estimate to within a couple of people
- the two pointers meet within tail plus cycle steps
- the uneven calendar is never less likely to produce a match
- the view is one of pairs, uneven, merge, sweep, effective, rho, rholength, pollard, cost, near, circle, spacing, nearscale, strong, loners, thresholds, smallyear
- the walk's survival stays within ten points of the birthday curve everywhere
- they meet at a multiple of the cycle length, once both are on the cycle
- two different slots
- what it returns divides n
buffon
7 kinds of claim · 9 placements
- at least one needle is dropped
- every needle claimed was drawn
- so a needle crosses with probability 2/π
- the area under half a sine wave is 1
- the box has area π/2
- the estimate is in a plausible range for pi
- the printed estimate is 2Ln / dc
chain
131 kinds of claim · 52 placements
- the wait for a new one at 0 seen is 6/6 ×21
- the 6 waits add to 6 times the harmonic sum ×3
- a run of the game reproduces the expected length
- a walk of 40000 steps spends about the solved share of its time at A
- a walk of 40000 steps spends about the solved share of its time at B
- a walk of 40000 steps spends about the solved share of its time at C
- and comes back to A about as often as the solve says
- and comes back to B about as often as the solve says
- and comes back to C about as often as the solve says
- and equal chances are the best case — any unevenness makes the wait longer
- and it is still climbing at the same rate
- and it really is stationary
- and that sum is bounded, so the shares can be normalised
- and the chance of ending at the top satisfies B = R + Q B
- and the chance of ever coming back is less than one
- and the chance of winning is the share of the stake held
- and the share of wins reproduces the computed chance
- and the traffic round the cycle is not equal in the two directions
- and they are the shares the rule leaves alone
- and they do not all take the same time, although every one of them has the same chance in any given window
- as much traffic goes from A to B as comes back
- as much traffic goes from A to C as comes back
- as much traffic goes from A to D as comes back
- as much traffic goes from A to E as comes back
- as much traffic goes from B to C as comes back
- as much traffic goes from B to D as comes back
- as much traffic goes from B to E as comes back
- as much traffic goes from C to D as comes back
- as much traffic goes from C to E as comes back
- as much traffic goes from D to E as comes back
- at even odds the expected length is k times N minus k
- at least two chains, so the comparison says something
- away from even odds the chance of winning is the ratio the odds give
- between six and sixty steps are drawn
- between two and four step-up chances are drawn
- between two and six patterns of two to five coin tosses
- every chain named is one the family carries
- every start can go either way
- every state has somewhere to go
- every state holds a share
- HH: the chain's answer and the overlap sum agree
- HH's wait is between the window size and twice it less two
- HHH: the chain's answer and the overlap sum agree
- HHH's wait is between the window size and twice it less two
- HHHH: the chain's answer and the overlap sum agree
- HHHH's wait is between the window size and twice it less two
- HHT: the chain's answer and the overlap sum agree
- HHT's wait is between the window size and twice it less two
- HT: the chain's answer and the overlap sum agree
- HT's wait is between the window size and twice it less two
- HTH: the chain's answer and the overlap sum agree
- HTH's wait is between the window size and twice it less two
- HTHT: the chain's answer and the overlap sum agree
- HTHT's wait is between the window size and twice it less two
- HTT: the chain's answer and the overlap sum agree
- HTT's wait is between the window size and twice it less two
- HTTH: the chain's answer and the overlap sum agree
- HTTH's wait is between the window size and twice it less two
- HTTT: the chain's answer and the overlap sum agree
- HTTT's wait is between the window size and twice it less two
- iterating from A reaches the same share for A
- iterating from A reaches the same share for B
- iterating from A reaches the same share for C
- no two edge weights are drawn on top of one another
- row A holds probabilities
- row B holds probabilities
- row C holds probabilities
- row D holds probabilities
- row E holds probabilities
- row F holds probabilities
- row G holds probabilities
- row H holds probabilities
- TH: the chain's answer and the overlap sum agree
- TH's wait is between the window size and twice it less two
- the alternating sum over subsets and the integral of one minus the product agree
- the chain is one of mixing, cycle, reducible, lazy
- the chain is one the family carries
- the chain with the smaller gap really does take longer
- the chance of a win is strictly between nothing and everything
- the chances of leaving A add to one
- the chances of leaving B add to one
- the chances of leaving C add to one
- the chances of leaving D add to one
- the chances of leaving E add to one
- the chances of leaving F add to one
- the chances of leaving G add to one
- the chances of leaving H add to one
- the collection is one the family knows
- the corroborating run is between 500 and 40,000 games
- the cycle's forward chance is between a half and one
- the cycle's shares are stationary even so
- the cycle's stationary shares are equal
- the distance to stationarity never rises
- the drawing runs out to between 10 and 60 states
- the expected number of steps satisfies t = 1 + Q t
- the expected return to A is one over its share
- the expected return to B is one over its share
- the expected return to C is one over its share
- the game is played over between four and nine totals
- the long-run shares are drawn only for a chain that has them
- the measured decay rate is the second eigenvalue
- the measured mixing time follows the eigenvalue's prediction
- the number of kinds to collect is between 2 and 16
- the panels drawn are genuinely different cases
- the patterns compared are all the same length
- the return chances satisfy the rule that defines them
- the rows never move further apart as the power rises
- the run is between 2,000 and 400,000 steps
- the run spends its time in A in the computed share
- the run spends its time in B in the computed share
- the run spends its time in C in the computed share
- the same current flows across every edge of the cycle
- the series is added over between 60 and 4,000 terms
- the share read off the weights is the share the equations give
- the shares add to one
- the solved share for A survives a step
- the solved share for B survives a step
- the solved share for C survives a step
- the stationary distribution adds to one
- the system is not singular
- the traffic between neighbours balances
- the view is one the family draws
- the walk is between a thousand and four hundred thousand steps
- the weights add to the geometric sum they are
- the weights are a square table of between three and six states
- the weights are all one, so the sum grows without bound
- the weights are symmetric and never negative
- the weights grow, so there is nothing to normalise
- TT: the chain's answer and the overlap sum agree
- TT's wait is between the window size and twice it less two
- while the wait for the rarest kind alone is already a lower bound
derange
127 kinds of claim · 65 placements
- after 6 rolls the sum stopped after 1 terms is above the truth ×105
- after 6 rolls the sum stopped after 2 terms is below the truth ×105
- for 1 people the chance lies between the two stopped sums ×60
- after 6 rolls the full sum agrees with the chain on faces seen ×35
- on the staircase of size 2, 0 rooks fit in S(2, 2) ways ×27
- the band of width 1 at 2: rook numbers and search agree ×17
- starting from event 1, the formula and every pattern of successes agree ×14
- with chances 1/k, starting at 1 is the classical rule passing over 0 ×14
- at 5 couples the chance is e^−2·(1 − 1/n) to within 1/n² ×12
- the ménage count at 3 by formula and by search ×10
- the 1-th factorial moment is 1 ×9
- the arrangements of 8 with exactly 0 in place, listed and counted ×9
- the count for threshold 0 agrees with the formula ×8
- the cycles of length 1, over all arrangements, number 40320/1 ×8
- r0 is Kaplansky's 2n/(2n − k)·C(2n − k, k) ×6
- Riordan's formula counts the 3 × 3 Latin rectangles with a fixed first row ×5
- every one of the 5040 orders was tried ×4
- the counted best for 5 matches the formula ×4
- the share with 0 matches is within sampling noise of the Poisson ×4
- the alternating sum lands on the 265 the search found ×3
- width 1 approaches e^−1 ×3
- with 2 choices among 8, every order counted agrees with the plan ×3
- between 3 and 9 objects, few enough to list ×2
- between three and twelve sizes, each between 2 and 20000 ×2
- 200 to 5000 trials
- 9 of them leave nothing where it started
- a die of 3 to 12 faces
- a group of up to 20 to 120 people
- a run of rolls starting at the number of faces
- a year of 50 to 1000 days
- all 24 arrangements are drawn
- an exhaustive point is at most 8 objects
- and by a larger factor each time
- and comes within a few per cent of it
- and it does better than taking one at random
- and its height there is the same number
- and sends no two objects to the same place
- and settles above the 0.5802 the limit is, rather than falling to 1/e
- and so forbid the same number of permutations
- and so is the chance of success
- and so is the variance
- and stays below the limit it is climbing towards
- and the best single threshold secures at least half of it
- and the half is never breached
- and with three, 0.6842
- another choice always helps
- arrangements of 20 to 5000 objects
- at least as many rolls as faces
- between 3 and 12 objects
- between 3 and 14 events, so every pattern can be enumerated
- between one and three rooks
- between three and eight couples
- between three and ten couples
- between three and ten sizes
- each correction crosses the answer rather than approaching it from one side
- each extra person brings the distribution closer to the Poisson
- each proportion is within one over the next factorial of 1/e
- each stop is on the side the rule says
- each stop lands on its own side of the truth, or on it
- equal rook numbers exactly when the multisets hᵢ − i agree
- every arrangement is counted once
- every arrangement is visited once
- from five couples on the chance rises towards its limit
- inclusion–exclusion over rook numbers equals the count by search
- more choices in hand never mean a later start
- N is from 50 to 100000
- no man in the drawing sits beside his partner
- no online rule beats the oracle
- one probability per event, each strictly between nought and one
- one to five increasing numbers of choices, up to 6
- sizes up to at most sixteen
- sizes up to at most twenty
- sizes up to between 6 and 16
- skipping the certain one is worth exactly one, whatever the setting
- so does the threshold set at the median of the maximum
- some permutation avoids the board
- the alternating sum reaches the same number
- the arrangement is a permutation of its own places
- the arrangement names every object exactly once
- the best achievable rank rises with the size of the field
- the best rule looks at some of them and not all of them
- the best threshold is heading for one over e
- the best threshold rises with the field
- the board is one the family draws
- the case is secretary, constant or custom
- the case is uniform or tight
- the chance falls as the field grows
- the exhaustive check is over 4 to 8 candidates
- the exhaustive count is drawn for between 3 and 8 objects
- the field has between 4 and 400 candidates
- the full alternating sum counts the numbers up to 1000 free of 2, 3, 5, 7, 11, 13
- the full sum is the chance, found without it
- the grid of every arrangement is drawn for at most 5 objects
- the largest field drawn is already close to that limit
- the limit curve peaks at one over e
- the mean number of matches is 1
- the number of objects is in the range this view can enumerate
- the oracle is never beaten
- the placements drawn are all of them
- the probability is strictly between nought and one
- the product of the failures times the sum of the odds is the same chance
- the rank the rule will accept gets stricter as more remain
- the ratio is drawn up to between 2 and 10 objects
- the rolls that show every face are the onto maps, counted by the same sum
- the rook polynomial of disjoint blocks is the product of theirs
- the running total ends at the count by search
- the settings are between nought and one
- the shortfall approaches the half as the setting shrinks
- the sizes drawn are between 3 and 400
- the standard demanded rises with the number still to come
- the start the odds rule picks is the best start
- the two boards drawn have the same rook numbers
- the value grid has between 200 and 2000 steps
- the view is one the family draws
- Touchard's formula equals the count by search
- Touchard's sum equals the count by search
- two choices approach e⁻¹ + e^(−3/2)
- two forbidden cells attack exactly when they are neighbours on the cycle
- two to eight primes
- whenever the odds reach one, the rule wins at least one time in e
- which is far above what the relative-ranking rule achieves
- with 1 choice among 8, every order counted agrees with the plan
- with one choice the plan is the classical rule
- with one object there is nothing to find, and the search finds nothing
- with three it is 3/2
- with two candidates the best expected rank is 5/4
- with two it wins three times in four
galton
6 kinds of claim · 12 placements
- a path bounces once per row
- and are centred under the funnel
- and ends in a bin the board has
- the exact bin shares add to one
- the path ends over the bin its right-turns name
- the row count is a whole number between 1 and 24
rgraph
38 kinds of claim · 33 placements
- the connected graphs on 4 points, counted twice by different means ×4
- above the threshold the measured share matches the equation's root
- and below it the largest piece is a vanishing share
- and below the threshold the equation has only the zero root
- and it is nonetheless not connected
- and it stays put to within half
- and the chance of at least one never exceeds the expected count, as Markov requires
- and the triangle's stays wider than it
- and well above it a triangle is nearly certain
- being connected is at most as likely as having no isolated point
- between four and forty samples at each size
- between one and four sizes, each at most six points
- between three and five sizes, each between fifty and twelve hundred
- between twenty and two hundred samples per point
- between two and four edge chances, each strictly between zero and one
- between two and four sizes, each between twenty and a hundred and forty
- connectivity's transition narrows relative to its threshold as the graph grows
- dividing by the two-thirds power is the division that stays put
- each sweep runs from mostly-absent to mostly-present
- every edge present is connected with probability one
- every point is in exactly one piece
- no edges is connected with probability zero
- the chance of being connected rises with p
- the comparison runs on between three and six points
- the component grows with the size, as it must
- the count of isolated points follows n·e⁻ᶜ
- the drawn graphs have between six and twenty points
- the enumeration runs on between two and six points
- the measured triangle count matches the expectation it is supposed to
- the number of points is between three and twenty
- the predicted share solves its own equation
- the range drawn reaches the connectivity threshold
- the sampled graphs have between sixty and three thousand points
- the sampled graphs have between two hundred and three thousand points
- the seed is a whole number the graphs can be drawn from
- the view is one the family draws
- well below the threshold a triangle is rare
- well past average degree one, most of the graph is in one piece
sample
36 kinds of claim · 21 placements
- row 0 of the transition matrix adds to one ×20
- the grid's error in 4 dimensions falls like N^(−2/4) ×5
- in 2 dimensions the grid is the faster ×2
- in 8 dimensions the grid is the slower ×2
- and a run of the chain reproduces it to within a twentieth
- and at four dimensions the two rates meet
- and holds no negative probability
- and is between 5 and 400 sharp
- and is positive everywhere on the interval, so no weight is unbounded
- and is repeated between 40 and 800 times
- and is run for between 2,000 and 200,000 steps
- and so is the weighted one — neither is biased
- and the Halton points' falls faster than that
- and the random one falls like N^(−1/2), whatever the dimension
- and the weighted one is appreciably quieter
- as much probability flows from i to j as back again
- between 32 and 2,048 points are drawn
- each dimension is a whole number between 1 and 12
- each estimate uses between 50 and 5,000 draws
- in 1 dimension the grid is the faster
- so a step leaves the target distribution where it was
- the chain has between 5 and 24 states
- the discarded start is shorter than the run
- the discrepancy is probed on a grid of between 40 and 300 boxes a side
- the grid's error in 1 dimension falls like N^(−2/1)
- the Halton points are more evenly spread than the random ones on this measure
- the peak sits inside the interval
- the plain average is centred on the answer
- the points to fit a slope through are not all at one place
- the proposal is a probability density
- the random points' discrepancy falls like one over the square root
- the seed is a whole number the drawing can be made from
- the spread is measured over between 4 and 200 runs
- the sweep runs over between 3 and 8 sizes
- the sweep runs to between 2^8 and 2^18 points
- the view is one the family draws
spread
138 kinds of claim · 51 placements
- coin summed 2 times has probabilities adding to one ×7
- coin summed 2 times has some spread to speak of ×7
- skew summed 2 times has probabilities adding to one ×7
- skew summed 2 times has some spread to speak of ×7
- die summed 2 times has probabilities adding to one ×6
- die summed 2 times has some spread to speak of ×6
- the sum of 4 divided by 4 has probabilities adding to one ×6
- the sum of 4 divided by 4 has some spread to speak of ×6
- the sum of 4 divided by the root of 4 has probabilities adding to one ×6
- the sum of 4 divided by the root of 4 has some spread to speak of ×6
- every one of the 6561 inputs at n = 8 is counted ×5
- the average of 1 draws still has the distribution of one draw ×5
- the sum of 4 has probabilities adding to one ×4
- the sum of 4 has some spread to speak of ×4
- and doubling the draws moves it toward the computed one at 0.3 ×3
- at 1.5 standard deviations the mass outside is within the bound ×3
- the bound holds at every deviation the distribution reaches, n = 8 ×3
- the measured rate at 0.3 is never below the computed one ×3
- there are exactly 91 possible histograms of 12 draws over three faces ×3
- the largest sum is a power of two between 16 and 128 ×2
- the support is an odd number of points between 21 and 121 ×2
- 0 nine times in ten, 10 otherwise has probabilities adding to one
- 0 nine times in ten, 10 otherwise has some spread to speak of
- 0 nine times in ten, 10 otherwise stays under the bound at every width
- a bound that says nothing belongs to a function one input nearly controls
- a die has probabilities adding to one
- a die has some spread to speak of
- a fair coin, ±1 has probabilities adding to one
- a fair coin, ±1 has some spread to speak of
- a fair coin, ±1 stays under the bound at every width
- a fair die has probabilities adding to one
- a fair die has some spread to speak of
- a fair die stays under the bound at every width
- and a distribution that is actually bell-shaped is far inside both of them
- and a useful bound to one where it does not
- and dividing by the root of n leaves it exactly where it started
- and increasing away from the mean
- and it comes within half the bound somewhere
- and it reaches it, so the bound is attained rather than merely true
- and its average against any such distribution is exactly the bound
- and its mean is exactly the level asked about
- and none is smaller than that divided by a polynomial in n
- and scaled so that one standard deviation is one unit
- and the more lopsided summand is further from the bell at every n
- and the rate at the mean itself is zero
- and the rate is the information distance from the original to the tilted law
- and the runs are further apart early than late
- and the second panel's settle on the height of the bell curve
- and the variance adds too
- asking about one tail rather than two is worth something
- at least one of the useful rows is not a sum, which is the point
- between 2 and 12 runs are drawn
- between 2 and 3 summands are compared
- between 2 and 4 averages, each of at most 64 draws
- between 2,000 and 60,000 averages are formed
- between 3 and 40 draws
- between 3 and 6 sums, each of at most 200 copies
- between 6 and 14 inputs
- between two and four input counts, each from 6 to 16
- between two and four levels are marked
- dividing by n shrinks the spread like 1/√n
- each distribution is one the family knows
- each n is between 2 and 200
- each run is between 50 and 5000 draws
- each sum is closer to the bell curve than the last
- each sum is of between 1 and 400 copies
- each window is between half a standard deviation and six
- every distribution swept is one the family knows
- every level is between the mean and the largest value
- every run finishes inside four standard errors of the mean
- five values, unevenly weighted has probabilities adding to one
- five values, unevenly weighted has some spread to speak of
- five values, unevenly weighted stays under the bound at every width
- it is centred at zero
- no histogram is more likely than exp(−nD)
- one input can move the answer at all
- sixteen dice has probabilities adding to one
- sixteen dice has some spread to speak of
- so one scaling is collapsing
- some distribution meets the constraints
- the average of two Cauchys has the density of one Cauchy, by the convolution integral
- the bell curve convolved with itself is the bell curve again, widened by √2
- the bell curve's exponent differs from the rate by enough to show over the range drawn
- the best distribution does not beat the bound
- the bound holds for n times the first flip
- the bound holds for the longest non-decreasing run of choices
- the bound holds for the longest run of heads in n flips
- the bound holds for the total of n coin flips
- the bound is met at between 1.2 and 5 standard deviations
- the certificate lies above the indicator at every support point
- the constrained region is not empty
- the constrained set has a probability strictly between nothing and everything
- the constraint asks for a mean above the true one and below the largest face
- the distribution has probabilities adding to one
- the distribution has some spread to speak of
- the distribution is one the family knows
- the event has positive probability at every n drawn
- the exact probability stays under the exponential the rate predicts
- the exhaustive sweep is feasible
- the extremal distribution has probabilities adding to one
- the extremal distribution has some spread to speak of
- the first panel's curves grow taller as they narrow
- the function is one of sum, longest, distinct, rising, dictator
- the functions are among sum, longest, distinct, rising, dictator
- the gap for 0 nine times in ten, 10 otherwise falls like one over the square root of n
- the gap for a fair coin, ±1 falls like one over the square root of n
- the gap for a fair die falls like one over the square root of n
- the histograms' chances add to one
- the level asked about is above the mean and below the largest value the summand can take
- the level is between the mean and the largest value the summand takes
- the mass at exactly k standard deviations is the whole of the bound
- the mean grows with the number of inputs, so the panels differ
- the mean of a sum is the sum of the means
- the measured decay rate agrees with the rate function computed from the summand alone
- the measured rate moves towards the smallest relative entropy in the region
- the measured rates come from between 16 and 96 draws
- the one-sided answer is Cantelli's
- the one-sided bound is strictly better than the two-sided one from the same two numbers
- the rate at a level away from the mean is positive
- the rate function is convex all the way along
- the scaled values are increasing
- the support runs to between 3 and 12 deviations
- the sweep includes a lopsided distribution
- the sweep is feasible
- the sweep runs to between 24 and 200 draws
- the table separates the functions the bound says something about from the ones it does not
- the tilted distribution has probabilities adding to one
- the tilted distribution has some spread to speak of
- the tilted weights are a distribution
- the two-sided answer is Chebyshev's bound
- the view is one the family draws
- the window is between 1.2 and 4 deviations wide
- the window is between 1.5 and 4 deviations
- the window is two-sided or one-sided
- three face values
- three positive chances
- three positive chances adding to one
- while a light-tailed average narrows by the square root of the count
walk
54 kinds of claim · 35 placements
- the formula agrees with the enumeration at 0 steps above ×7
- the sum of 4 steps has probabilities adding to one ×4
- the sum of 4 steps has some spread to speak of ×4
- a walk in space escapes, and the simulation sees it
- a walk on a line comes back, and the horizon barely hides it
- a walk on a plane comes back too, but more slowly
- a walk takes a whole positive number of steps
- an endpoint has the parity of the step count
- an even number of steps between 8 and 200
- and impossible with everything
- and moves the start to its mirror image
- and so are the reflected ones
- and the distribution is symmetric
- and the gap to the bell curve closes at every step
- and the variance of its position is exactly the number of steps
- and their spread is the square root of the number of steps
- between 4 and 16 steps are drawn, since every path of them is enumerated
- each exact distribution is of between 2 and 400 steps
- each step moves one place along one axis
- every game drawn ends at a barrier
- every path from below the level has to cross it
- every path is counted once
- every step is drawn
- every step is one place, either way
- every walk is counted once
- folding leaves the endpoint alone
- folding matches the touching paths with the paths from the mirrored start one for one
- ruin is certain with nothing left
- some walk goes outside the envelope, because √n is typical and not maximal
- the distribution sums to one
- the drawn path really does touch the level
- the drawn walk's mean square displacement per step is near one in every window
- the durations satisfy their own recurrence
- the enumerated check runs at an even length between 4 and 16
- the extremes are more likely than the middle, which is the whole surprise
- the least likely outcome is an even split
- the paths ending where they end are counted by a binomial coefficient
- the player starts with something and not everything
- the position has the parity of the step count
- the quoted constant is Pólya's
- the ruin probabilities satisfy their own recurrence
- the spread of the endpoints is of the order of the square root of the steps
- the table holds between 4 and 40 units
- the three windows are whole numbers of steps
- the three windows are whole numbers of steps inside the walk
- the time spent above is always even
- the view is one the family draws
- the walk can reach its endpoint in the steps allowed
- the walk comes back to where it started at least once
- the walk has no drift
- the walk is between 400 and 60,000 steps long
- the walk starts above the level it may touch
- the walks are centred on where they started
- the win probability is a probability