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fix: mathlib4 breakage from nightly-2026-09-11 #69

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Merged
Kha merged 1 commit into from
Sep 11, 2026
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fix: mathlib4 breakage from nightly-2026-09-11 #69

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3 changes: 3 additions & 0 deletions mathlib4/Mathlib/FieldTheory/Galois/IsGaloisGroup.lean
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Expand Up @@ -202,6 +202,9 @@ instance intermediateField [Finite G] [hGKL : IsGaloisGroup G K L] :
have := hGKL.isGalois
.of_mulEquiv_algEquiv e fun _ _ ↦ rfl

set_option synthInstance.maxHeartbeats 80000 in
-- The `Algebra K (IsScalarTower.toAlgHom K F L).fieldRange` instance in the proof needs more
-- than the default limit.
attribute [local instance] FractionRing.liftAlgebra in
/-- If `G` is a finite Galois group for `B / R` and `R ⊆ A ⊆ B` is a tower of commutative domains
with `A` integrally closed, then the fixing subgroup of the image of `A` in `B` is a Galois group
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