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experiment: which linarith can not be replaced with grind? #140

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experiment: which `linarith` can not be replaced with `grind`?
kim-em Oct 20, 2025
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from 32668
kim-em Dec 10, 2025
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cast_nonneg
kim-em Dec 10, 2025
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cast_nonneg
kim-em Dec 10, 2025
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cleanup
kim-em Dec 16, 2025
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backport https://github.com/leanprover-community/mathlib4/pull/32936
kim-em Dec 16, 2025
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spurious diffs
kim-em Dec 20, 2025
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2 changes: 1 addition & 1 deletion Mathlib/Combinatorics/Additive/VerySmallDoubling.lean
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Expand Up @@ -143,7 +143,7 @@ lemma mul_inv_eq_inv_mul_of_doubling_lt_two (h : #(A * A) < 2 * #A) : A * A⁻¹

private lemma weaken_doubling (h : #(A * A) < (3 / 2 : ℚ) * #A) : #(A * A) < 2 * #A := by
rw [← Nat.cast_lt (α := ℚ), Nat.cast_mul, Nat.cast_two]
linarith only [h]
linarith

private lemma nonempty_of_doubling (h : #(A * A) < (3 / 2 : ℚ) * #A) : A.Nonempty := by
by_contra! rfl
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1 change: 1 addition & 0 deletions lakefile.lean
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Expand Up @@ -34,6 +34,7 @@ abbrev mathlibOnlyLinters : Array LeanOption := #[
⟨`linter.allScriptsDocumented, true⟩,
⟨`linter.pythonStyle, true⟩,
⟨`linter.style.longFile, .ofNat 1500⟩,
⟨`linter.tacticAnalysis.regressions.linarithToGrind, true⟩,
-- ⟨`linter.nightlyRegressionSet, true⟩,
-- `latest_import.yml` uses this comment: if you edit it, make sure that the workflow still works
]
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