#19045: better subs method for matrices
------------------------------+-------------------------------------
Reporter: vdelecroix | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.9
Component: linear algebra | Keywords:
Merged in: | Authors: Vincent Delecroix
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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As mentioned on [https://groups.google.com/forum/#!topic/sage-
devel/n2Sc8moP7Jk this sage-devel thread] the `.subs()` method of matrices
behaves badly with polynomials.
{{{#!python
sage: x = polygen(ZZ)
sage: matrix([[x]]).subs(x=1)
Traceback (most recent call last):
...
ValueError: must not specify both a keyword and positional argument
sage: x.subs(1).parent()
Integer Ring
sage: matrix([[x]]).subs(1).parent()
Full MatrixSpace of 1 by 1 dense matrices over Univariate
Polynomial Ring in x over Integer Ring
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/19045>
Sage <http://www.sagemath.org>
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