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Update FLT/DedekindDomain/FiniteAdeleRing/BaseChange.lean
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Co-authored-by: Kevin Buzzard <[email protected]>
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WilliamCoram and kbuzzard authored Dec 11, 2024
1 parent 94fabdd commit 8515376
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4 changes: 2 additions & 2 deletions FLT/DedekindDomain/FiniteAdeleRing/BaseChange.lean
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Expand Up @@ -437,8 +437,8 @@ theorem ProdAdicCompletions.baseChangeEquiv_isFiniteAdele_iff
sorry -- #240

theorem ProdAdicCompletions.baseChangeEquiv_isFiniteAdele_iff' (x : ProdAdicCompletions A K) :
ProdAdicCompletions.IsFiniteAdele x ↔ ∀ (l : L), ProdAdicCompletions.IsFiniteAdele
(ProdAdicCompletions.baseChangeEquiv A K L B (l ⊗ₜ x)) := by
ProdAdicCompletions.IsFiniteAdele x ↔ ∀ (l : L), ProdAdicCompletions.IsFiniteAdele
(ProdAdicCompletions.baseChangeEquiv A K L B (l ⊗ₜ x)) := by
constructor
· simp_rw [ProdAdicCompletions.baseChangeEquiv_isFiniteAdele_iff A K L B, baseChangeEquiv,
AlgEquiv.coe_ofBijective, Algebra.TensorProduct.lift_tmul, map_one, one_mul]
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