Changes between Version 3 and Version 4 of Ticket #7729
- Timestamp:
- Dec 18, 2009, 4:26:02 PM (13 years ago)
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Ticket #7729 – Description
v3 v4 13 13 The following issues remain. 14 14 15 * It may require some revision in order to follow Sage's coercion model. David Roe suggested that the _coerce_impl method should be removed. 16 17 * 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. 15 * David Roe suggested that the _coerce_impl method should be removed. I have not looked at this yet. 18 16 19 17 * It should be made to work with Affine Weyl groups. I have not checked whether this requires further modification. … … 21 19 * 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 20 21 * Later I may add a method to compute intertwining elements which depend on spectral parameters. These have applications to representations of p-adic groups. 22 23 23 For some further discussion of this topic see 24 24 http://groups.google.com/group/sage-combinat-devel/browse_thread/thread/78fc23f23cafe705?hl=en