#10028: inconsistent error messages for inverting singular matrices
------------------------------+---------------------------------------------
Reporter: dmharvey | Owner: jason, was
Type: defect | Status: positive_review
Priority: trivial | Milestone: sage-4.6.2
Component: linear algebra | Keywords:
Author: Andre Apitzsch | Upstream: N/A
Reviewer: Rob Beezer | Merged:
Work_issues: |
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Changes (by newvalueoldvalue):
* status: needs_review => positive_review
* reviewer: => Rob Beezer
* author: => Andre Apitzsch
Old description:
> n = 2:
> {{{
> sage: Matrix([[1, 1], [1, 1]])^(-1)
> ...
> ZeroDivisionError:
> }}}
>
> apparently all other n:
> {{{
> sage: Matrix([[1, 1, 1], [1, 1, 1], [1, 1, 1]])^(-1)
> ...
> ZeroDivisionError: input matrix must be nonsingular
> }}}
New description:
n = 2:
{{{
sage: Matrix([[1, 1], [1, 1]])^(-1)
...
ZeroDivisionError:
}}}
apparently all other n:
{{{
sage: Matrix([[1, 1, 1], [1, 1, 1], [1, 1, 1]])^(-1)
...
ZeroDivisionError: input matrix must be nonsingular
}}}
Apply trac_10028_error_messages.patch
--
Comment:
Looks real good. Thanks for straightening this out. Passes all tests on
4.6.2.alpha2. Positive review.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10028#comment:4>
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