Opened 6 months ago
Closed 6 months ago
#15740 closed defect (fixed)
Better support for root systems which do not come from a Cartan type
Reported by: | tscrim | Owned by: | sage-combinat |
---|---|---|---|
Priority: | major | Milestone: | sage-6.2 |
Component: | combinatorics | Keywords: | root systems |
Cc: | sage-combinat, nthiery | Merged in: | |
Authors: | Travis Scrimshaw | Reviewers: | Frédéric Chapoton |
Report Upstream: | N/A | Work issues: | |
Branch: | public/combinat/root_systems/non_typed-15740 (Commits) | Commit: | d52d5a57997ed7b79f1ef79afe2471a3f4c9dba9 |
Dependencies: | Stopgaps: |
Description (last modified by tscrim)
sage: d = DynkinDiagram() sage: d.add_edge(1,2,3) sage: d.add_edge(2,3) sage: d.add_edge(3,4,3) sage: d.cartan_matrix() [ 2 -1 0 0] [-3 2 -1 0] [ 0 -1 2 -1] [ 0 0 -3 2] sage: Q = d.root_system().root_lattice() sage: Q Root lattice of the Root system of type Dynkin diagram of rank 4 sage: al = Q.simple_roots() sage: al[1].reflection(al[2]) # Boom
Change History (10)
comment:1 Changed 6 months ago by tscrim
- Branch set to public/combinat/root_systems/non_typed-15740
- Commit set to 1c0a6c7549966eb34e76931d7833a16dc5d36a4c
- Description modified (diff)
- Status changed from new to needs_review
comment:2 Changed 6 months ago by chapoton
Looks good to me, but maybe one could add a test for the index_set correct behavior ?
comment:3 Changed 6 months ago by tscrim
It's implicitly there in the symmetrizer test, but I'll add an explicit test.
comment:4 Changed 6 months ago by git
- Commit changed from 1c0a6c7549966eb34e76931d7833a16dc5d36a4c to 05415fc560664b5b8eb5af0e55a655c3974aacc2
Branch pushed to git repo; I updated commit sha1. New commits:
ac731d2 | Trac 12141: finite algebras over fields |
baa9c86 | Merge branch 'u/pbruin/12141-FiniteAlgebra' of trac.sagemath.org:sage into public/algebras/finite_algebra-12141 |
9052b7c | Partial work on refactoring morphisms. |
6badedb | Merge branch 'public/combinat/root_systems/non_typed-15740' of trac.sagemath.org:sage into public/combinat/root_systems/non_typed-15740 |
05415fc | Added doctest to Cartan matrix. |
comment:5 Changed 6 months ago by git
- Commit changed from 05415fc560664b5b8eb5af0e55a655c3974aacc2 to d52d5a57997ed7b79f1ef79afe2471a3f4c9dba9
comment:6 Changed 6 months ago by tscrim
After a little error with git (I forgot to base the branch off develop), I've added the requested doctest.
comment:7 Changed 6 months ago by chapoton
- Keywords root systems added
- Reviewers set to Frédéric Chapoton
- Status changed from needs_review to positive_review
ok, good to go.
comment:8 Changed 6 months ago by tscrim
Thanks Frederic.
comment:9 Changed 6 months ago by vbraun_spam
- Milestone changed from sage-6.1 to sage-6.2
comment:10 Changed 6 months ago by vbraun
- Resolution set to fixed
- Status changed from positive_review to closed
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I fixed this by giving a method symmetrizer to the Dynkin diagrams. This uncovered another small bug in that the index set wasn't being taking from the Dynkin diagram (i.e. its vertices) which is also fixed here.
New commits: