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For questions on the formal system in mathematical logic for expressing effective functions, programs and computation, and proofs, using abstract notions of functions and combining them through binding and substitution.
6
votes
What is the history of the Y-combinator?
Turing's 1937 paper (of just one page!) which defines $\Theta$, his own fixed point combinator, refers to a 1936 paper by Kleene in which a "function L with a property similar to the essential propert …