#13302: Matrix constructor does not return over padic field
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Reporter: saraedum | Owner: jason, was
Type: defect | Status: needs_work
Priority: minor | Milestone: sage-5.3
Component: padics | Resolution:
Keywords: matrix space | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Julian Rueth | Merged in:
Dependencies: | Stopgaps:
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Changes (by saraedum):
* keywords: matrix space, padics => matrix space
* component: linear algebra => padics
Old description:
> The following code does not return in sage 5.1.rc1.
>
> {{{
> sage: MatrixSpace(Qp(3),1,1)([Qp(3).zero()])
> }}}
>
> The problem is, that the matrix constructor tries to unpack a padic zero
> which is an infinite list of zeros.
New description:
The following code does not return in sage 5.1.rc1.
{{{
sage: MatrixSpace(Qp(3),1,1)([Qp(3).zero()])
}}}
The problem is that the matrix constructor tries to unpack a padic zero
which is an infinite list of zeros.
Another example where the unpacking does not work is the following:
{{{
sage: MatrixSpace(Qp(3),1,1)([Qp(3)(4/3)])
[1 + O(3^20)]
}}}
The problem here is that the iterator returned for a padic (implicitly
defined through {{{__getitem__}}}) starts at the term with valuation 0.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13302#comment:4>
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