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Often we want to say things like "match all incoming edges (and their sources) to a vertex" and other things that cannot be expressed as a single homomorphism from a single C-Set. There are a couple i…
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This ticket adds a function that just checks whether there exists a homomorphism from the given graph to another one.
The classical LP patch `:-)`
Nathann
Apply trac_13691.patch, trac_13691_Sum.…
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Over the last couple of weeks, I have noticed sporadic but fairly frequent failed Travis jobs for Semigroups. These seem to be various kinds of actual crashes.
I have restarted all of these jobs as…
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Hey folks!
First off, thank you for writing such a wonderful tool!
I work for findhelp.com and we just had our 2023 hackathon, in which we worked on leveraging import-linter to create a Github A…
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A *lot* of the boring details of these proofs could be automated using domain-specific solvers. For instance [this proof](https://github.com/maxsnew/multi-poly-cats/commit/553e112dfc7a74c3b96fcb597380…
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On Ubuntu 18.04, with 9.2.beta13, running
```
sage -tp src/sage/graphs/generic_graph.py src/sage/graphs/graph.py
```
with the following optional packages:
```
Using --optional=4ti2,build,ccache,cr…
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Ticket #9792 implements `inverse_image` and `is_injective` for polynomial ring homomorphisms. Based on that, this ticket implements the methods
- `inverse`
- `is_invertible`
- `is_surjective`
This…
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Hi,
I'm doing some computations based on enumerating graphs via "nauty_geng()", which enumerate all graphs of a given order.
For each graph, among other few things, I test the odd girth of the gene…
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The function `mca` is currently being depended on downstream, so it would be good to isolate and add to a release of AlgebraicPetri. Following the code, it looks like SubACSets.jl might be the only pi…
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For polynomial ring homomorphisms, this ticket implements the methods
- `inverse_image` (of both ideals and individual elements)
- `kernel`
- `is_injective`
- `_graph_ideal`
(This also works for h…