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cleanup(#4480): FltRegularBernoulli Furtwaengler/ArtinHasse/DworkCoeffLeadingTermCongruence.lean — simpa best-API trim #4749

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Merged
CBirkbeck merged 1 commit into from
Jun 24, 2026
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cleanup(#4480): FltRegularBernoulli Furtwaengler/ArtinHasse/DworkCoeffLeadingTermCongruence.lean — simpa best-API trim #4749

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2 changes: 1 addition & 1 deletion ...lar/Reflection/ResidueSymbol/Furtwaengler/ArtinHasse/DworkCoeffLeadingTermCongruence.lean
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Expand Up @@ -142,7 +142,7 @@ theorem pow_sub_pow_mem_pow_succ_of_sub_mem_sq
have hleft : γ ^ n * (γ - π) ∈ I ^ (n + 2) := by
have hmul : γ ^ n * (γ - π) ∈ I ^ n * I ^ 2 :=
Ideal.mul_mem_mul hγn hγπ
simpa [pow_add, Nat.add_assoc, Nat.add_comm, Nat.add_left_comm] using hmul
simpa [Ideal.IsTwoSided.pow_add] using hmul
have hright : (γ ^ n - π ^ n) * π ∈ I ^ (n + 2) := by
have hmul : (γ ^ n - π ^ n) * π ∈ I ^ (n + 1) * I ^ 1 :=
Ideal.mul_mem_mul ih (by simpa using hπ)
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