Changes between Initial Version and Version 2 of Ticket #7729


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Timestamp:
Dec 18, 2009, 1:47:51 AM (13 years ago)
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  • Ticket #7729

    • Property Summary changed from Iwahori Hecke algebras to Iwahori Hecke algebras [with patch, needs review]

  • Ticket #7729 – Description

    initial v2  
    1717* The get_action method is a kludge to avoid the crash reported in #7725. That crash is fixed by David Roe's patch in #7718, but this patch does not work with the patch in #7718.
    1818
     19* It should be made to work with Affine Weyl groups. I have not checked whether this requires further modification.
     20
     21* Subjectively, it seems a little slow compared with a previous implementation for type A only. This is probably a limitation of the {{{WeylGroup()}}} class on which it depends. My earlier implementation was based on Permutation. If it proves unacceptably slow it may be possible to speed it up by a caching scheme.
     22
    1923For some further discussion of this topic see
    2024http://groups.google.com/group/sage-combinat-devel/browse_thread/thread/78fc23f23cafe705?hl=en
    2125
    22 It is well tested for type A and is probably correct for all Cartan Types of finite type. I have not tried it with
    23 
     26It is well tested for type A and is probably correct for all Cartan Types of finite type.