Refinable functions, used for constructing wavelets and subdivision schemes, seem similar: https://en.wikipedia.org/wiki/Refinable_function https://en.wikipedi

Refinable functions, used for constructing wavelets and subdivision schemes, seem similar: https://en.wikipedia.org/wiki/Refinable_function https://en.wikipedia.org/wiki/Refinable_function and https://arxiv.org/abs/1012.2453 https://arxiv.org/abs/1012.2453