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[Merged by Bors] - chore(Order/Hom/Basic): fix EquivLike OrderIso instance diamond #38559

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SnirBroshi wants to merge 2 commits into from
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[Merged by Bors] - chore(Order/Hom/Basic): fix EquivLike OrderIso instance diamond #38559

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a1e40a1
chore(Order/Hom/Basic): delete redundant `EquivLike OrderIso` instance
SnirBroshi Apr 26, 2026
cf432da
cheeky fix
SnirBroshi Apr 26, 2026
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11 changes: 2 additions & 9 deletions Mathlib/Order/Hom/Basic.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -718,15 +718,8 @@ section LE

variable [LE α] [LE β] [LE γ]

instance : EquivLike (α ≃o β) α β where
coe f := f.toFun
inv f := f.invFun
left_inv f := f.left_inv
right_inv f := f.right_inv
coe_injective' f g h₁ h₂ := by
obtain ⟨⟨_, _⟩, _⟩ := f
obtain ⟨⟨_, _⟩, _⟩ := g
congr
instance : EquivLike (α ≃o β) α β :=
inferInstance

instance : OrderIsoClass (α ≃o β) α β where
map_le_map_iff f _ _ := f.map_rel_iff'
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