#17585: Implement coordinate_ring() for free module elements
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Reporter: jdemeyer | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.5
Component: linear algebra | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jdemeyer/ticket/17585 | f7ef4c52a51b5c3da33b795a150476d00cbeb63a
Dependencies: #10513, #17578, | Stopgaps:
#17561, #17583, #17584, #17587, |
#16399, #17602 |
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Description changed by jdemeyer:
Old description:
> See https://groups.google.com/forum/#!topic/sage-devel/7n5xtT9Dw2g
>
> We add a method `element_ring` to `FreeModule` and `FreeModuleElement`
> indicating the ring from which the entries `v[i]` come. Example:
> {{{
> sage: M = (ZZ^2) * (1/2)
> sage: v = M([0,1/2])
> sage: v.base_ring()
> Integer Ring
> sage: v.element_ring()
> Rational Field
> }}}
New description:
See https://groups.google.com/forum/#!topic/sage-devel/7n5xtT9Dw2g
We add a method `coordinate_ring` to `FreeModule` and `FreeModuleElement`
indicating the ring from which the entries `v[i]` come. Example:
{{{
sage: M = (ZZ^2) * (1/2)
sage: v = M([0,1/2])
sage: v.base_ring()
Integer Ring
sage: v.coordinate_ring()
Rational Field
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/17585#comment:10>
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