#10347: Implementation of is_(skew_)symmetrizable for matrices
------------------------------+---------------------------------------------
Reporter: stumpc5 | Owner: tbd
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-4.7.1
Component: combinatorics | Keywords: symmetrizable matrix
Work_issues: | Upstream: N/A
Reviewer: [email protected] | Author: Christian Stump
Merged: | Dependencies:
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Changes (by hthomas):
* status: needs_review => needs_work
* reviewer: => [email protected]
Comment:
*
{{{
sage: M=matrix([[0,6],[0,0]])
sage: M.is_symmetrizable(return_diag=true)
[1, 1]
}}}
This M is not symmetrizable, and the returned diagonal matrix doesn't
symmetrize it.
*
{{{
sage: M=matrix([2])
sage: M.is_symmetrizable()
False
}}}
The code is checking that the diagonal entries are all zero even when
testing for symmetrizability.
* Zelevinsky spells his name with a final "y".
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10347#comment:5>
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