Opened 3 years ago

Last modified 10 months 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 tscrim)

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:

Change History (28)

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comment:26 Changed 12 months ago by tscrim

  • Keywords days80 days93.51 added
  • Milestone changed from sage-7.2 to sage-8.3

comment:27 Changed 12 months ago by tscrim

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comment:28 Changed 10 months ago by vdelecroix

  • Milestone changed from sage-8.3 to sage-8.4

update milestone 8.3 -> 8.4

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