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Write a method for the `IntegralLattice` class for generating the root lattices An, Dn, En, Euclidian lattice, U with standard basis.
Example:
```
IntegralLattice(["A",3])
IntegralLattice("U")
Int…
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Hi all,
'fnmatch' is used in at.lattice.utils.checkname and at.get_refpts and maybe others. To describe in one pattern elements with diferent patterns the regular expresions 're' is more convinient…
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New Features:
```
- Extended weight lattice/space for affine types
- coxeter_matrix and coxeter_diagram (for crystallographic types)
- Embeddings of the root lattice/space in root lattice realizati…
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Various computations in toric geometry rely on the (saturated) N-sublattice generated by a cone and its complement and projections onto these. And, similarly, for the dual cones in the M-lattice. Th…
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Inequality for the class `AdditiveAbelianGroup` has a bug:
```
sage: AdditiveAbelianGroup([0,0]) == AdditiveAbelianGroup([0,0])
True
sage: AdditiveAbelianGroup([0,0]) != AdditiveAbelianGroup([0,0]…
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The closure of the torus orbit associated to a cone of the fan is again a toric variety. This patch implements a method `toric_variety.orbit_closure(cone)` to construct this toric variety.
**Apply:…
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The two attached patches implement cartesian products for cones/fans and toric varieties, respectively.
Depends on #10675.
**Apply:**
1. [attachment: trac_10809_fan_cartesian_product.patch](https…
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Implement a class for the orthogonal group of integral lattices.
Its elements are isometries of the ambient spaces which preserve the lattice.
As functionality:
- Its elements have an action on el…
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Last one in this series, I promise.
The Lyapunov rank measures the length of a `lyapunov_like_basis()` and quantifies how many equations you can get out of the complementarity condition ` = 0`. Cou…