Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
596e65d7df
This PR generalizes `Std.Sat.AIG. relabel(Nat)_unsat_iff` to allow the AIG type to be empty. We generalize the proof, by showing that in the case when `α` is empty, the environment doesn't matter, since all environments `α → Bool` are isomorphic. This showed up when reusing the AIG primitives for building a k-induction based model checker to prove arbitrary width bitvector identities. |
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