[Merged by Bors] - feat: add definition of opposite of subsemirings, subrings, and subalgebras#12846
[Merged by Bors] - feat: add definition of opposite of subsemirings, subrings, and subalgebras#12846
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Can you copy the |
Let me check later. |
Done. |
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| /-- A subalgebra `S` of `A / R` determines a subring `S.op` of the opposite ring `Aᵐᵒᵖ / R`. -/ | ||
| @[simps] | ||
| def opEquiv : Subalgebra R A ≃o Subalgebra R Aᵐᵒᵖ where |
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| def opEquiv : Subalgebra R A ≃o Subalgebra R Aᵐᵒᵖ where | |
| def opOrderIso : Subalgebra R A ≃o Subalgebra R Aᵐᵒᵖ where |
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But it's called Submonoid.opEquiv for Submonoid, etc.
PR summary 0f07e4166aImport changesNo significant changes to the import graph
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Thanks! maintainer merge |
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🚀 Pull request has been placed on the maintainer queue by YaelDillies. |
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| namespace Subsemiring | ||
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| variable {ι R : Type*} [NonAssocSemiring R] |
eric-wieser
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Just the ι issue to solve (in all three files)
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✌️ acmepjz can now approve this pull request. To approve and merge a pull request, simply reply with |
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bors r+ |
…gebras (#12846) similar to that in `Mathlib.Algebra.Group.Subgroup.MulOpposite`
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Pull request successfully merged into master. Build succeeded: |
…gebras (#12846) similar to that in `Mathlib.Algebra.Group.Subgroup.MulOpposite`
…gebras (#12846) similar to that in `Mathlib.Algebra.Group.Subgroup.MulOpposite`
…gebras (#12846) similar to that in `Mathlib.Algebra.Group.Subgroup.MulOpposite`
similar to that in
Mathlib.Algebra.Group.Subgroup.MulOppositediscussion: https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there-code-for-X.3F/topic/Subalgebra.2EequivOpposite