#12778: Incorrect coercion of matrix elements when from different rings
----------------------------------+-----------------------------------------
Reporter: kcrisman | Owner: jason, was
Type: defect | Status: new
Priority: major | Milestone: sage-5.0
Component: linear algebra | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
----------------------------------+-----------------------------------------
Description changed by dsm:
Old description:
> {{{
>
> sage: M =
> matrix([[1,.9,1/5,x^2],[2,1.9,2/5,x^3],[3,2.9,3/5,x^4],[4,3.9,4/5,x^5]])
> sage: type(M)<type
> 'sage.matrix.matrix_symbolic_dense.Matrix_symbolic_dense'>
> sage: M[ 1.00000000000000 0.900000000000000 0.200000000000000
> x^2]
> [ 2 1.90000000000000 2/5 x^3]
> [ 3 2.90000000000000 3/5 x^4]
> [ 4 3.90000000000000 4/5 x^5]
> sage: latex(M)\left(\begin{array}{rrrr}
> 1.00000000000000 & 0.900000000000000 & 0.200000000000000 & x^{2} \\
> 2 & 1.90000000000000 & \frac{2}{5} & x^{3} \\
> 3 & 2.90000000000000 & \frac{3}{5} & x^{4} \\
> 4 & 3.90000000000000 & \frac{4}{5} & x^{5}
> \end{array}\right)
> }}}
> Notice that the first row does something different to the entries than
> the others.
New description:
{{{
sage: M =
matrix([[1,.9,1/5,x^2],[2,1.9,2/5,x^3],[3,2.9,3/5,x^4],[4,3.9,4/5,x^5]])
sage: type(M)
<type 'sage.matrix.matrix_symbolic_dense.Matrix_symbolic_dense'>
sage: M
[ 1.00000000000000 0.900000000000000 0.200000000000000 x^2]
[ 2 1.90000000000000 2/5 x^3]
[ 3 2.90000000000000 3/5 x^4]
[ 4 3.90000000000000 4/5 x^5]
sage: latex(M)
\left(\begin{array}{rrrr}
1.00000000000000 & 0.900000000000000 & 0.200000000000000 & x^{2} \\
2 & 1.90000000000000 & \frac{2}{5} & x^{3} \\
3 & 2.90000000000000 & \frac{3}{5} & x^{4} \\
4 & 3.90000000000000 & \frac{4}{5} & x^{5}
\end{array}\right)
}}}
Notice that the first row does something different to the entries than the
others.
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12778#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
