#15023: Branching rule A2->A1 never returns
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Reporter: vbraun | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-5.12
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Dependencies:
Stopgaps: |
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Comment (by bump):
This works:
{{{
sage: A2(1,0).branch(A1,rule="levi")
A1(0) + A1(1)
}}}
But it remains a problem that the code is not very forgiving if you forget
to specify a branching rule. There are two possible approaches to fixing
this.
The first would be to raise a ValueError if the branching rule is omitted.
The second would be to try to guess the branching rule by consulting a
table. The first way would be easy to implement and I can submit a patch
for it.
--
Ticket URL: <http://trac.sagemath.org/ticket/15023#comment:1>
Sage <http://www.sagemath.org>
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