#13878: Fix failing assertion in linbox/matrix/permutation-matrix.h
--------------------------------------------+-------------------------------
Reporter: SimonKing | Owner: jason, was
Type: defect | Status: new
Priority: major | Milestone: sage-5.6
Component: linear algebra | Resolution:
Keywords: debug, linbox, assertion | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
--------------------------------------------+-------------------------------
Comment (by nbruin):
It looks like trivial spans in large ZZ-modules are to blame:
{{{
invfac=[0]*75
n = len(invfac)
A = ZZ**n
B = A.span([A.gen(i) * invfac[i] for i in xrange(n)])
}}}
runs OK, but with `invfac=[0]*76` we get the abort. With
`invfac=[1]+[0]*100` or `invfac=[0]*100+[1]` we don't get an error.
Perhaps this helps to find the problematic code path?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13878#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.
