#10626: Route sparse integer matrices to a working Smith form
------------------------------+---------------------------------------------
Reporter: rbeezer | Owner: jason, was
Type: defect | Status: new
Priority: minor | Milestone: sage-4.6.2
Component: linear algebra | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
------------------------------+---------------------------------------------
Sparse integer matrices get sent to the generic Smith form routine, where
they fail (see #10625). They should instead get dense-ified
and routed to the integer-only version. This solves some failures on
#10604.
{{{
sage: A = matrix(2, range(4), sparse=True)
sage: A.smith_form()
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/home/sage/sage-4.6.1.alpha2/devel/sage-main/<ipython console> in
<module>()
/home/sage/sage-4.6.1.alpha2/local/lib/python2.6/site-
packages/sage/matrix/matrix2.so in sage.matrix.matrix2.Matrix.smith_form
(sage/matrix/matrix2.c:37477)()
/home/sage/sage-4.6.1.alpha2/local/lib/python2.6/site-
packages/sage/matrix/matrix2.so in sage.matrix.matrix2._smith_onestep
(sage/matrix/matrix2.c:42366)()
/home/sage/sage-4.6.1.alpha2/local/lib/python2.6/site-
packages/sage/matrix/matrix2.so in sage.matrix.matrix2._smith_onestep
(sage/matrix/matrix2.c:42181)()
/home/sage/sage-4.6.1.alpha2/local/lib/python2.6/site-
packages/sage/matrix/matrix2.so in
sage.matrix.matrix2._generic_clear_column (sage/matrix/matrix2.c:41049)()
/home/sage/sage-4.6.1.alpha2/local/lib/python2.6/site-
packages/sage/rings/integer.so in sage.rings.integer.Integer.inverse_mod
(sage/rings/integer.c:28740)()
/home/sage/sage-4.6.1.alpha2/local/lib/python2.6/site-
packages/sage/rings/integer.so in sage.rings.integer.as_Integer
(sage/rings/integer.c:6052)()
/home/sage/sage-4.6.1.alpha2/local/lib/python2.6/site-
packages/sage/rings/integer.so in sage.rings.integer.Integer.__init__
(sage/rings/integer.c:7312)()
TypeError: unable to coerce <class 'sage.rings.ideal.Ideal_pid'> to an
integer
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10626>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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