The tree an error budget opens, against a rectangle that does not move

The tree an error budget opens, against a rectangle that does not move

A pattern of 16 characters over 4 symbols in 3,000 characters. The rising line is the interval extensions the walk performs, multiplying by 17, 13, 10 for each error added; the flat line is the whole dynamic-programming table, which costs 48,000 cells whatever k is because k only decides which of the filled cells count as answers. They do not cross inside this range. The vertical axis is logarithmic.

Drawn at 700 × 430, wide on the page. Everything above is what error-budget returns with no arguments; the caption is the generator's own, computed from the numbers in the drawing rather than written beside it.

7 essays call error-budget. The drawing above is what it returns with no arguments at all; every call below passes it something, because a placement that passes nothing draws whichever member of the family the generator happens to default to rather than the one its essay argues about — which is what optcheck and figfill exist to catch.