Fixpoints in Haskell

I gave a brief informal talk about fixpoints and their uses in functional programming at the Norcross Haskathon yesterday. I ended up promising to write it up as a blog post, as well. This is that post. Just to set expectations from the beginning: This is not research; it’s just exposition of things that are already widely known in programming language theory. If you eat denotational semantics for

[igrep]

fixがなんで再帰で作られているのかよくわかる