#12630: Add representations of quivers and quiver algebras to sage
-------------------------------------+-------------------------------------
Reporter: JStarx | Owner: AlexGhitza
Type: enhancement | Status: closed
Priority: major | Milestone: sage-6.3
Component: algebra | Resolution: fixed
Keywords: algebra, quiver, | Merged in:
module, days49 | Reviewers: Simon King, Travis
Authors: Jim Stark, Simon | Scrimshaw
King, Mathieu Guay-Paquet, Aladin | Work issues:
Virmaux | Commit:
Report Upstream: N/A | Stopgaps:
Branch: |
f3402ef849622e1f5a7d88205c2911ecd6d03ffa|
Dependencies: #12412, #12413, |
#14806, #15491, #15623, #15810 |
-------------------------------------+-------------------------------------
Changes (by nthiery):
* commit: f3402ef849622e1f5a7d88205c2911ecd6d03ffa =>
Comment:
Hi!
With #15801 and this ticket, I am getting the following error:
{{{
sage: Q = DiGraph({1:{3:['a']}, 2:{3:['b']}}).path_semigroup()
sage: spaces = {1: QQ^2, 2: QQ^3, 3: QQ^2}
sage: maps = {(1, 3, 'a'): (QQ^2).Hom(QQ^2).identity(), (2, 3,
'b'): [[1, 0], [0, 0], [0, 0]]}
sage: M = Q.representation(QQ, spaces, maps)
sage: TestSuite(M).run()
Failure in _test_category:
...
The following tests failed: _test_category
}}}
And indeed:
{{{
sage: M in M.category()
False
}}}
This is due to the following (apparent?) inconsistency:
{{{
sage: M.category().base_ring()
Path algebra of Multi-digraph on 3 vertices over Rational Field
sage: M.base_ring()
Rational Field
}}}
Question: which one do we want to change?
Cheers,
Nicolas
--
Ticket URL: <http://trac.sagemath.org/ticket/12630#comment:270>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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