#10347: Implementation of is_(skew_)symmetrizable for matrices
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Reporter: stumpc5 | Owner: tbd
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.7.1
Component: combinatorics | Keywords: symmetrizable matrix
Work_issues: | Upstream: N/A
Reviewer: Hugh Thomas | Author: Christian Stump
Merged: | Dependencies:
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Changes (by stumpc5):
* status: needs_work => needs_review
Comment:
Replying to [comment:18 hthomas]:
> Yeah, on reflection, I think that's a good idea. I'm pretty sure it's
part of the standard definition of symmetrizable, too. (Though I just
checked, and wikipedia doesn't think so.) Maybe you should just change
the default setting of positive?
done!
Now as you write it, I remember that I checked the wiki page when I first
wrote the method and saw that positivity is not assumed there. Maybe there
is another context where symmetrizability is used. (Actually, our
algorithm only works for integral domains with certain elements being
invertible, while the general definition of symmetrizability doesn't
assume that.)
Best, Christian
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10347#comment:19>
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