Port to Lean 4.31#828
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Bump lean-toolchain to leanprover/lean4:v4.31.0, pin leanprover-community/mathlib to v4.31.0, refresh lake-manifest.
Foundational-layer drift: FunLike coe_injective' rename, Function.comp_def, Finset.toSet -> coercion, simpa defeq-boundary -> using!, non-inferrable instance -> def/lemma. No statements changed; no sorry.
v4.31 drift across Basic/Arithmetic/Bootstrapping/Completeness/Incompleteness/SetTheory/Skolemization: defeq-boundary crossings, zero_le now-implicit qualification, quote/typed-quote unfolds, instance -> def. Incompleteness theorems stay axiom-clean (no sorry); no statements changed.
v4.31 drift across Hilbert/Kripke/Neighborhood/FMT/Boolean/Entailment: SetLike rename, Finset.toSet -> coercion, simpa -> using!, grind/omega regressions, instance -> def/lemma. No statements changed; no sorry.
v4.31 drift across Hilbert/Kripke/Logic/Boxdot/Algebra/Modality: simpa defeq-boundary -> using!, Finset.toSet -> coercion, conditional/non-inferrable instance -> def/lemma, grind/omega/assumption regressions (trivial/simp/relation-unfold), match equation-gen -> Sum.elim, refine-from metavar fix. No statements changed; no sorry.
…apt to Lean/Mathlib v4.31.0 v4.31 drift: buildAxioms HasJ instance -> def, simpa -> using!, Finset.toSet -> coercion, grind regressions, letterless-realization simpa. No statements changed; no sorry.
Output of the required pre-submission step `lake exe mk_all --module`: updates the shake directive header (--deprecated_module: ignore) for v4.31. Import list unchanged.
Member
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Hello. We're currently planning to update to v4.31 after incorporating fixes such #823 by @iehality. |
This was referenced Jul 2, 2026
Contributor
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Thanks, @lividgreen . Though we're liklely using mine ( #830 ), this likely accelerated the process! |
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I'm using Foundation for my own project. But I run Lean 4.31, so I had to port this with Claude for myself.
It IS AI-generated content, and I'm not an expert in Lean, so may be a good example of AI slop. But build is green.
I hope it is helpful rather than distracting.