#6923: Matrix numerical approximation converts complex to real
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Reporter: Henryk.Trappmann | Owner: tbd
Type: defect | Status: new
Priority: major | Milestone:
Component: algebra | Keywords:
Reviewer: | Author:
Merged: |
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Description changed by Henryk.Trappmann:
Old description:
> sage: A = Matrix(CC,3); A.parent()
> Full MatrixSpace of 3 by 3 dense matrices over Complex Field with 53 bits
> of precision
> sage: B = A.n(20); B.parent()
> Full MatrixSpace of 3 by 3 dense matrices over Real Field with 20 bits of
> precision
>
> IMHO .n() only should change the precision, no other conversion.
> This is also the behaviour of .n() on ComplexField.
New description:
sage: A = Matrix(CC,3); A.parent()[[BR]]
Full MatrixSpace of 3 by 3 dense matrices over Complex Field with 53 bits
of precision[[BR]]
sage: B = A.n(20); B.parent()[[BR]]
Full MatrixSpace of 3 by 3 dense matrices over Real Field with 20 bits of
precision[[BR]]
IMHO .n() only should change the precision, no other conversion.[[BR]]
This is also the behaviour of .n() on ComplexField.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6923#comment:1>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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