#17405: solve_right with matrix right hand side fails over RDF and CDF
---------------------------------+----------------------------
Reporter: fredrik.johansson | Owner:
Type: defect | Status: new
Priority: minor | Milestone: sage-6.5
Component: linear algebra | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
---------------------------------+----------------------------
Solving {{{AX=B}}} for a matrix {{{B}}} using {{{solve_right}}} or {{{\}}}
works over many rings, but not {{{RDF}}} or {{{CDF}}}. Example:
{{{
sage: MatrixSpace(QQ,10,10,).random_element() \
MatrixSpace(QQ,10,1).random_element()
[ -783/1145]
[ 15697/18320]
[ -4647/18320]
[ -2599/7328]
[ 20289/73280]
[ -3791/18320]
[-70107/36640]
[-12407/36640]
[ -1588/1145]
[ -7059/9160]
sage: MatrixSpace(RR,10,10,).random_element() \
MatrixSpace(RR,10,1).random_element()
[ 0.0620590489221758]
[ -0.584548090301576]
[ -0.106165379993850]
[ 1.52004291094317]
[ -1.03573096808637]
[ 0.0822404955372452]
[ -0.145002162865055]
[ 0.262055581969539]
[ 1.35298542346484]
[-0.0727293754429877]
sage: MatrixSpace(RDF,10,10,).random_element() \
MatrixSpace(RDF,10,1).random_element()
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
<ipython-input-16-0286e0222123> in <module>()
----> 1 MatrixSpace(RDF,Integer(10),Integer(10),).random_element() *
BackslashOperator() *
MatrixSpace(RDF,Integer(10),Integer(1)).random_element()
/home/fredrik/sage-6.3/local/lib/python2.7/site-
packages/sage/misc/preparser.pyc in __mul__(self, right)
1413 (0.0, 0.5, 1.0, 1.5, 2.0)
1414 """
-> 1415 return self.left._backslash_(right)
1416
1417
/home/fredrik/sage-6.3/local/lib/python2.7/site-
packages/sage/matrix/matrix2.so in sage.matrix.matrix2.Matrix._backslash_
(build/cythonized/sage/matrix/matrix2.c:4193)()
/home/fredrik/sage-6.3/local/lib/python2.7/site-
packages/sage/matrix/matrix_double_dense.so in
sage.matrix.matrix_double_dense.Matrix_double_dense.solve_right
(build/cythonized/sage/matrix/matrix_double_dense.c:11896)()
TypeError: vector of constants over Real Double Field incompatible with
matrix over Real Double Field
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/17405>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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