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Functional Programming in Lean Exercise

FP-in-Lean Book Repo

FP-in-Lean Online Book

👉NEXT Theorem-Proving-in-Lean4

About

This repo is basically all my personal programming exercise. It was written on the fly and might not be immediately relevant to you. Apart from the examples and exercises mentioned in FP-in-Lean book, I write many variants of the definitions (with ' suffix) due to my experience with Coq and attempted to prove them.

May Potentially Useful Information

  • by simp may not work as expected if Lean 4 release >= 4.3.0. You can not use simp to close the goal although it could be closed in the same way written in the textbook due to the change of simp default.More explanation in Lean4 community
    • Close the goal with two other ways: (by simp (config := {decide := true})) and by decide. This change resets the simp default to match previous versions.