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We move `CombintorialFreeModuleElement` to its own class `IndexedFreeModuleElement` and cythonize it for (future) speed gains.
CC: @sagetrac-sage-combinat @nthiery @jdemeyer @fchapoton
Component:…
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The motivation has been [discussed](https://groups.google.com/d/msg/sage-devel/jdLfIKQ1M18/LJq-rc2rCgAJ) [numerous](https://groups.google.com/d/msg/sage-devel/92OdoUbBDbE/Uwq78LmxAgAJ) [times](https…
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This is an implementation of Hochschild (co)homology as a first approach to work with implementing infinite chain complexes.
Depends on #19609
Depends on #19613
Depends on #19608
Depends on #20229
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The main changes here: use `n_cells` instead of `n_faces` throughout the simplicial complex code, and then sort `n_cells`. This way, it is easy to understand the indexing of the matrices defining th…
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In recent tests, using pari is faster than Sage's current default algorithm for computing homology groups of chain complexes. For example:
```
sage: %timeit simplicial_complexes.RandomComplex(12, 4…
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SimplicialComplex.is_cohen_macaulay() now works with an arbitrary base ring (ZZ or a field). The default is QQ.
Component: **algebraic topology**
Keywords: **days74, simplicial complex, cohen-mac…
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Added functionality for shifted simplicial complexes and Rudin's and Ziegler's nonshellable 3-balls.
Depends on #20732
Component: **algebraic topology**
Keywords: **simplicial complex, days74**
…
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These two point sets of each five points in 3D space differ only by one component (`x` in fouth coordinate) and are triangulated correctly into two tetrahedra. However, the second one (`points2`) seem…
tomka updated
8 years ago
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`algebraic_topological_model.py` contains help classes and functions for computing (co)homology of simplicial complexes; in particular, the cup product for the cohomology ring. As such, it contains …
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The FriCAS interface is currently very rudimentary. In particular, converting the results of a computation into sage types is available only in very few special cases.
Depends on #21209
CC: @sag…