#14967: Bug with DiGraph
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Reporter: mercatp | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-5.11
Component: graph theory | Resolution:
Keywords: graph | Merged in:
Authors: Paul Mercat | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Dependencies:
Stopgaps: |
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Comment (by mercatp):
Ok, I understand.
So the test {{{if u in IntegerRing()}}} is not a good idea, it would be
better to impose u to be of type int for example :
{{{#!python
if type(u) == int:
u_int = u
else:
return -1
}}}
This should be faster.
And it's better to impose a strict type for the number, because an 1 in a
given number field is not the same that an 1 in an other number field for
example (we can imagine a graph with differents vertex 1, although it's
weird).
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Ticket URL: <http://trac.sagemath.org/ticket/14967#comment:3>
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