#19922: pushout between real and complex interval fields
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Reporter: vdelecroix | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-7.1
Component: coercion | Resolution:
Keywords: | Merged in:
Authors: Vincent | Reviewers:
Delecroix, Daniel Krenn | Work issues:
Report Upstream: N/A | Commit:
Branch: u/dkrenn/19922 | 9e5201d9cce844665151a96ef12c9e8806ec6ca4
Dependencies: | Stopgaps:
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Description changed by dkrenn:
Old description:
> We have
> {{{
> sage: ComplexIntervalField(64).an_element() +
> RealIntervalField(128).an_element()
> 1 + 1*I
> sage: parent(_)
> Complex Interval Field with 64 bits of precision
> }}}
> But
> {{{
> sage: ComplexIntervalField(128).an_element() +
> RealIntervalField(64).an_element()
> Traceback (most recent call last):
> ...
> TypeError: unsupported operand parent(s) for '+'
> }}}
> The above should work with parent `ComplexIntervalField(64)`.
New description:
We have
{{{
sage: ComplexIntervalField(64).an_element() +
RealIntervalField(128).an_element()
1 + 1*I
sage: parent(_)
Complex Interval Field with 64 bits of precision
}}}
But
{{{
sage: ComplexIntervalField(128).an_element() +
RealIntervalField(64).an_element()
Traceback (most recent call last):
...
TypeError: unsupported operand parent(s) for '+'
}}}
The above should work with parent `ComplexIntervalField(64)`.
The fix includes implementing `algebraic_closure` for
`ComplexIntervalField`.
--
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Ticket URL: <http://trac.sagemath.org/ticket/19922#comment:7>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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