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CC: @tscrim @fchapoton
Component: **combinatorics**
Keywords: **subword complex**
Author: **Christian Stump**
Branch/Commit: **[`e8ad2a9`](https://github.com/sagemath/sagetrac-mirror/commit/e…
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Installing the ChomP package causes `ChainComplex` to give different (and basically wrong) answers. Here are two examples from the doctests:
```
sage: C = ChainComplex([matrix(ZZ, 1, 1, [2]), matr…
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As was noticed in #14793, some sanity checks need to be disabled in Hom when called upon unpickling because the input may include an unitialized parent. Since #14793, this is achieved by looking at …
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When a simplicial complex has tuples as vertices, the automorphism group is wrong: it is always returned as the trivial group.
CC: @nathanncohen
Component: **algebraic topology**
Keywords: **sim…
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The Császár polyhedron is a triangulation of the torus. It is already available as `simplicial_complexes.Torus()`, but not well enough documented.
Let us enhance the doc.
Component: **algebraic to…
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This is a useful tool to have, I think.
Component: **algebraic topology**
Keywords: **simplicial complex**
Author: **Frédéric Chapoton**
Branch/Commit: **[`74a606d`](https://github.com/sagemath/…
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Running `add_face` on a simplicial complex doesn't clear various data related to homology calculations:
```
sage: T = SimplicialComplex([range(1,5)]).n_skeleton(1)
sage: T.homology()
{0: 0, 1: Z x …
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The attached patch provides a `fundamental_group` method for simplicial complexes.
Depends on #12339
Component: **algebraic topology**
Author: **John Palmieri**
Reviewer: **Miguel Marco**
Merge…
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The attached patch adds a new collection of examples of simplicial complexes called "sum complexes". I'm interested in them because their homology can have large torsion groups relative to the numbe…
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Implement a test for whether a simplicial complex is a pseudo-manifold. If it is, construct its suspension using Datta's one-point suspension.
Component: **algebraic topology**
Keywords: **sd40**
…