Editing Recursion (section)

===Finite subdivision rules===
{{Main|Finite subdivision rule}}
Finite subdivision rules are a geometric form of recursion, which can be used to create fractal-like images. A subdivision rule starts with a collection of polygons labelled by finitely many labels, and then each polygon is subdivided into smaller labelled polygons in a way that depends only on the labels of the original polygon. This process can be iterated. The standard `middle thirds' technique for creating the [[Cantor set]] is a subdivision rule, as is [[barycentric subdivision]].