#19830: Classification of finite and affine Coxeter groups
-------------------------------------+-------------------------------------
Reporter: stumpc5 | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.1
Component: combinatorics | Resolution:
Keywords: coxeter system, | Merged in:
root system | Reviewers:
Authors: Travis Scrimshaw | Work issues:
Report Upstream: N/A | Commit:
Branch: | d86d0abf581635109f147bc3b75c7efb0d819899
public/combinat/fix_coxeter_type_relabelling-19830| Stopgaps:
Dependencies: |
-------------------------------------+-------------------------------------
Changes (by {'newvalue': u'Travis Scrimshaw', 'oldvalue': ''}):
* cc: darij (added)
* commit: => d86d0abf581635109f147bc3b75c7efb0d819899
* milestone: sage-7.0 => sage-7.1
* branch: => public/combinat/fix_coxeter_type_relabelling-19830
* author: => Travis Scrimshaw
Comment:
Here is a fix for relabelling issues that I came across. Although I think
this might be better on a separate ticket.
@darij the previous test for checking for relabelled types gave false
negatives. Consider F,,4,, under cyclic shift and under interchanging 1
and 3. These are the ''same'' type and our relabelling check does not
distinguish between them (nor can any algorithm).
How do we want to handle the affine types or the general case? I'm
guessing for the affine types, we just use the untwisted types. Do we even
want to consider the general case at this point?
----
New commits:
||[http://git.sagemath.org/sage.git/commit/?id=d86d0abf581635109f147bc3b75c7efb0d819899
d86d0ab]||{{{Improving support for relabelled Coxeter types.}}}||
--
Ticket URL: <http://trac.sagemath.org/ticket/19830#comment:12>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
