#16876: Fix cocharge on A2Dual rigged configurations and better support for
D_4^(3)
and relabelled types
-----------------------------+------------------------------------
Reporter: tscrim | Owner: sage-combinat
Type: defect | Status: new
Priority: critical | Milestone: sage-6.4
Component: combinatorics | Keywords:
Merged in: | Authors: Travis Scrimshaw
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
-----------------------------+------------------------------------
Currently, cocharge is not calculated correctly for type
A,,2n,,^(2)\dagger^. The cocharge should be half of the virtual.
{{{
sage: RC = RiggedConfigurations(CartanType(['A',4,2]).dual(),
[[1,1],[2,2]])
sage: for mg in RC.module_generators:
....: mg.cocharge()
....: mg.to_virtual_configuration().cocharge()
....: print ""
0
0
1/2
2
0
2
1/2
2
1/2
4
0
4
1
6
}}}
Also rigged configurations for type D,,4,,^(3)^ and other relabelled types
aren't well supported, but is solved with better handling of the index
set.
{{{
sage: RC = RiggedConfigurations(['D',4,3], [[1,1]])
sage: RC.module_generators
(
(/)
(/)
)
}}}
There should be another generator.
--
Ticket URL: <http://trac.sagemath.org/ticket/16876>
Sage <http://www.sagemath.org>
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