Opened 5 years ago
Last modified 2 years ago
#20394 new task
Work on reflection groups
| Reported by: | stumpc5 | Owned by: | |
|---|---|---|---|
| Priority: | major | Milestone: | sage-8.4 |
| Component: | combinatorics | Keywords: | days80, days93.51 |
| Cc: | tscrim, chapoton, nthiery, vripoll | Merged in: | |
| Authors: | Reviewers: | ||
| Report Upstream: | N/A | Work issues: | |
| Branch: | Commit: | ||
| Dependencies: | Stopgaps: |
Description (last modified by )
The work on reflection groups is in:
- #11187: main ticket with the first implementation
- #20395: (merged into #11187) preparation for the category framework to demand the method
degrees. - #20396: (merged into #11187) Implementation of the invariant form for crg's.
- #20477: Reduced words in crg's.
- #20445: Iteration algorithm using coset decomposition
- #20484: cythonizing has_descent, first_descent, descents. Code is available in #20445
- #20521: left/right actions for real and primal/dual for all reflection groups
- #25467: discriminant up- and downstairs
- #25466: Ambient space transformation
- #25477: iteration through general permutation groups (used for non-real reflection groups)
Other improvements:
- #20440: Field of definition
- #20444: Fake degree polynomial
- #20448: Generators of module of derivations
- #25478: Fix bug in is_regular
- #25483: Implement Coxeter numbers in the sense of Malle
- #25479: Jacobian and primitive vector field
- #25485: Braid orbit of reduced words in Coxeter group
Related tickets:
- #20402: Get subword complexes to work with reflection groups
- #20943: Updated the c flip implementation that was forgotten in #20402
- #20420: Dual braid monoid/group and Hecke algebras
- #18631: Rational Cherednik algebras (for finite Weyl groups)
- #20469: Ariki-Koike algebras
- #17303: Specht modules for Hecke algebras
- #25487: bug in minimal working example of Coxeter groups
Gap3, Chevie, and the raw data:
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- Keywords days80 days93.51 added
- Milestone changed from sage-7.2 to sage-8.3
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- Milestone changed from sage-8.3 to sage-8.4
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update milestone 8.3 -> 8.4