Kim Morrison 460b3c3e43 fix: grind propagates 0 * a = 0 for CommSemiring (#11881) ... This PR fixes an issue where `grind` failed to prove `f ≠ 0` from `f * r ≠ 0` when using `Lean.Grind.CommSemiring`, but succeeded with `Lean.Grind.Semiring`. The `propagateMul` propagator handles `0 * a = 0` and `a * 0 = 0` rules for semirings that don't have full ring support in grind. Previously, `CommSemiring` was excluded because it uses a ring envelope for normalization, but that approach doesn't propagate these equalities back to the original terms. Now `CommSemiring` also uses `propagateMul`. Reported as https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Grind.20failure.20for.20CommSemiring.2C.20not.20Semiring 🤖 Prepared with Claude Code --------- Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>		2026-01-05 03:14:35 +00:00
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bench	feat: pre and post may return "done" in Sym.simp (#11900)	2026-01-05 02:10:06 +00:00
bench-radar	chore: measure dynamic symbols in benchmarks (#11568)	2025-12-11 16:10:27 +00:00
compiler
elabissues
ir
lake	fix: lake: meta import transitivity (#11683)	2025-12-16 08:28:52 +00:00
lean	fix: grind propagates 0 * a = 0 for CommSemiring (#11881)	2026-01-05 03:14:35 +00:00
pkg	chore: ensure every pkg/ test has a correct lean-toolchain file (#11782)	2025-12-23 17:17:22 +00:00
playground
plugin
simpperf
.gitignore
common.sh	feat: module system is no longer experimental (#11637)	2025-12-12 21:20:26 +00:00
lakefile.toml	feat: module system is no longer experimental (#11637)	2025-12-12 21:20:26 +00:00
lean-toolchain