Rounding
Named by 2 essays across 2 fields — each of them below, with the objects they name alongside it.
A difference too small to draw
Two starting points a ten-thousandth apart, under the same rule, with nothing random anywhere. Within forty steps they have nothing in common — and the rule was not doing anything to them that it does not do to everything.
The seat that vanishes when the house grows
Twenty-seven whole seats have to be divided between five regions whose exact shares are 15.417, 7.209, 1.755, 1.431 and 1.188. Every rule for rounding those five numbers breaks something, and the instance drawn here breaks all three of the classical ways at once.
Named alongside it
The objects these essays reach for when they reach for this one.
Alabama paradoxApportionmentChaosCounting argumentDeterminismDivisor methodIterationLogistic mapOrbitPigeonhole principlePredictionQuota rule