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For question in Proof Theory, where "proofs" themselves are the object of mathematical investigation. It is not to be used to request a proof of some result.
14
votes
When are two proofs of the same theorem really different proofs
Some additional recent references on "equivalence" or "homotopy" between proofs include
S. Awodey, Type theory and homotopy, also on the arXiv
Various notes by V. Voevodsky
Not that I understand m …