#12912: Interface to Fokko Ducloux's Coxeter 3
---------------------------------+------------------------------------------
Reporter: nthiery | Owner: sage-combinat
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-5.7
Component: combinatorics | Resolution:
Keywords: coxeter | Work issues: category setting
Report Upstream: N/A | Reviewers: Anne Schilling, Nicolas M.
Thiery
Authors: Mike Hansen | Merged in:
Dependencies: #8359 | Stopgaps:
---------------------------------+------------------------------------------
Comment (by aschilling):
The updated patch fixes the WeylGroup versus CoxeterGroup issue that
Nicolas mentioned. It also fixed a segfault caused by computing KL
polynomial for elements that are not comparable in Bruhat order
{{{
sage: W = CoxeterGroup(['A', 3], implementation='coxeter3')
sage: W.kazhdan_lusztig_polynomial([1],[3,2])
------------------------------------------------------------------------
Unhandled SIGSEGV: A segmentation fault occurred in Sage.
This probably occurred because a *compiled* component of Sage has a bug
in it and is not properly wrapped with sig_on(), sig_off(). You might
want to run Sage under gdb with 'sage -gdb' to debug this.
Sage will now terminate.
}}}
The implementation of the parabolic KL polynomials is changed so that it
works with infinite Coxeter groups.
Anne
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12912#comment:22>
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 http://groups.google.com/group/sage-trac?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
