#15291: The Matroid() function should support rings that don't implement
is_field()
------------------------------+-----------------------------
Reporter: Stefan | Owner:
Type: enhancement | Status: new
Priority: minor | Milestone: sage-5.13
Component: matroid theory | Keywords: matroid
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Example:
{{{
sage: R.<x,y> = ZZ['x','y']
sage: Q = R.quotient([x^2 - y + 1, y^3 + 3 * x - 7])
sage: A = Matrix(Q, [[1,0,1],[0,1,1]])
sage: M = Matroid(A)
Traceback (most recent call last)
...
NotImplementedError:
}}}
Solution:
Catch NotImplementedError in a try... except block. Probably do the same
for the order() test in the same line of code of
sage/matroids/constructor.py
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Ticket URL: <http://trac.sagemath.org/ticket/15291>
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