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<oerjan> learn Bottom is where you might end up with a catamorphism, if not careful. There be balrogs.
author HackBot
date Thu, 17 Dec 2015 02:30:41 +0000
parents 886257b5c7b7
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A zygohistomorphic prepromorphism is used when you really need both semi-mutual recursion and history and to repeatedly apply a natural transformation as you get deeper into the functor.