[Merged by Bors] - feat(AlgebraicTopology): subcomplexes of simplicial sets#21542
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[Merged by Bors] - feat(AlgebraicTopology): subcomplexes of simplicial sets#21542
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PR summary 2e2f1639cdImport changes for modified filesNo significant changes to the import graph Import changes for all files
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joelriou
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Mar 2, 2025
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Thanks 🎉 bors merge |
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This PR introduces `SSet.Subcomplex` as an abbreviation for `Subpresheaf`. (This is needed because `SSet` is defined as a category of presheaves, but not reducibly so.) (Part of the purpose of this PR is to shorten the diff of the refactor PR #21090.) Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>
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Pull request successfully merged into master. Build succeeded: |
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Mar 14, 2025
…21090) Some new API is introduced for subcomplexes of the standard simplex: any `S : Finset (Fin (n + 1))` defines a subcomplex `face S` of `Δ[n]`, and this face is isomorphic to `Δ[m]` when `Fin (m + 1) ≃o S`. Then, boundaries and horns are redefined as subcomplexes of the standard simplex and it is shown that they are unions of certain codimension one faces of the standard simplex. - [x] depends on: #21543 - [x] depends on: #21540 - [x] depends on: #21542 - [x] depends on: #21303 - [x] depends on: #21047 - [x] depends on: #20840 - [x] depends on: #21096 Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>
tukamilano
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Mar 20, 2025
…21090) Some new API is introduced for subcomplexes of the standard simplex: any `S : Finset (Fin (n + 1))` defines a subcomplex `face S` of `Δ[n]`, and this face is isomorphic to `Δ[m]` when `Fin (m + 1) ≃o S`. Then, boundaries and horns are redefined as subcomplexes of the standard simplex and it is shown that they are unions of certain codimension one faces of the standard simplex. - [x] depends on: #21543 - [x] depends on: #21540 - [x] depends on: #21542 - [x] depends on: #21303 - [x] depends on: #21047 - [x] depends on: #20840 - [x] depends on: #21096 Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>
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This PR introduces
SSet.Subcomplexas an abbreviation forSubpresheaf. (This is needed becauseSSetis defined as a category of presheaves, but not reducibly so.)(Part of the purpose of this PR is to shorten the diff of the refactor PR #21090.)