#12630: Add representations of quivers and quiver algebras to sage
-------------------------------------+-------------------------------------
Reporter: JStarx | Owner: AlexGhitza
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.2
Component: algebra | Resolution:
Keywords: algebra, quiver, | Merged in:
module, days49 | Reviewers: Simon King
Authors: Jim Stark, Simon | Work issues:
King, Mathieu Guay-Paquet, Aladin | Commit:
Virmaux | 823fff5635870f31cb6308b3ecb371b6899b5101
Report Upstream: N/A | Stopgaps:
Branch: |
u/SimonKing/ticket/12630 |
Dependencies: #12412, #12413, |
#14806, #15491, #15623, #15810 |
-------------------------------------+-------------------------------------
Comment (by nthiery):
Replying to [comment:199 SimonKing]:
> I think the problem with conversion of the path semigroup of the empty
quiver into the path algebra of a non-empty quiver is this: The coercion
framework tries to do a consistency check, for which it needs an element
of the domain. But for the empty quiver, `an_element()` rightfully fails
with an empty set error.
>
> Do you really think we should fix this corner case?
In a perfect world, the coercion framework would honor EmptySetError ...
Might be easy to fix. Otherwise, yes I guess ignoring the corner case is
alright for now.
(In general I dislike the coercion framework using of element creation and
duck typing as it does now; but that's a separate story).
--
Ticket URL: <http://trac.sagemath.org/ticket/12630#comment:203>
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.
For more options, visit https://groups.google.com/groups/opt_out.
