#17990: Matrix with Infinity
-------------------------------------+-------------------------------------
Reporter: virmaux | Owner:
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.7
Component: calculus | Resolution:
Keywords: InfinityRing, | Merged in:
matrix, days64 | Reviewers: Jean-Philippe Labbé
Authors: | Work issues:
Report Upstream: N/A | Commit:
Branch: | 36263134d2c65c97ef3e57e8f0efa2e8ba0b52b9
u/virmaux/matrix_with_infinity | Stopgaps:
Dependencies: |
-------------------------------------+-------------------------------------
Changes (by jipilab):
* status: needs_review => needs_work
* reviewer: => Jean-Philippe Labbé
Old description:
> Because there is no `is_zero` and `is_commutative` method for
> `InfinityRing`, a numerous methods fails for matrices with infinity
> elements. This problem came up in relation with the ticket #17798.
>
> {{{
> sage: m = Matrix([Infinity])
> sage: m.nrows()
> 1
> sage: m.rows()
> ---------------------------------------------------------------------------
> AttributeError Traceback (most recent call
> last)
>
> [...]
> AttributeError: 'InfinityRing_class' object has no attribute 'is_zero'
> }}}
New description:
Because there is no `is_zero` and `is_commutative` method for
`InfinityRing`, numerous methods fails for matrices with infinity
elements. This problem came up in relation with the ticket #17798.
{{{
sage: m = Matrix([Infinity])
sage: m.nrows()
1
sage: m.rows()
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
[...]
AttributeError: 'InfinityRing_class' object has no attribute 'is_zero'
}}}
--
Comment:
Hi Aladin,
Could you please do the following
-add your full name as an Author,
-make the title of the ticket reflect the addition of the two methods.
This ticket is not about matrix with Infinity, but rather about the fact
that we need two methods on the infinity ring.
--
Ticket URL: <http://trac.sagemath.org/ticket/17990#comment:19>
Sage <http://www.sagemath.org>
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