Generator

cobweb

A generator in the dynamics library, called 7 times across 1 essays. Below: what it draws at its defaults and at each mode an essay asks for, what it checks while drawing, and everywhere it is used.

cobweb is one function. Everything below came out of it during this build, at parameters taken from the essays rather than invented for this page — so a figure here is the same figure a reader meets in an essay, and if the generator changes, this page changes with it.

At its defaults

the logistic map at 3.2, iterated from 0.2A map drawn as a curve with the diagonal across it, and the staircase that iterating it produces.xf(x)x ↦ 3.2x(1 − x), started at 0.2the orbit settles into a cycle of 2 points

show: "orbit"

the logistic map at 3.9, 80 stepsThe value of an orbit plotted against the step number.10x ↦ 3.9x(1 − x), 80 steps from 0.2the same orbit the cobweb draws, plotted against time instead of against itself

What it checks while it draws

Collected by running the family and listening to lib/verify.js, not written here. The count is how many separate times this build put that claim to the test.

Where it is called

Changing this generator changes every figure on this list. That is what makes the list worth publishing rather than keeping in a check script.

The whole library · What the figures prove