#7714: bug in matrix rank over multivariate polynomial ring
-----------------------------------+----------------------------------------
Reporter: was | Owner: malb
Type: defect | Status: new
Priority: major | Milestone: sage-4.3.1
Component: commutative algebra | Keywords:
Work_issues: | Author:
Upstream: N/A | Reviewer:
Merged: |
-----------------------------------+----------------------------------------
{{{
sage: matrix([PolynomialRing(GF(2),2,'x').gen()]).rank()
[x0]
1
{(0, 0): x0}
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call
last)
/scratch/wstein/sage/temp/sage.math.washington.edu/22996/_scratch_wstein_sage_init_sage_0.py
in <module>()
/scratch/wstein/build/sage-4.3.rc0/local/lib/python2.6/site-
packages/sage/matrix/matrix0.so in sage.matrix.matrix0.Matrix.rank
(sage/matrix/matrix0.c:16202)()
/scratch/wstein/build/sage-4.3.rc0/local/lib/python2.6/site-
packages/sage/matrix/matrix0.so in sage.matrix.matrix0.Matrix.pivots
(sage/matrix/matrix0.c:16074)()
RuntimeError: BUG: matrix pivots should have been set but weren't, matrix
parent = 'Full MatrixSpace of 1 by 1 dense matrices over Multivariate
Polynomial Ring in x0, x1 over Finite Field of size 2'
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7714>
Sage <http://www.sagemath.org>
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