id summary reporter owner description type status priority milestone component resolution keywords cc merged author reviewer upstream work_issues branch commit dependencies stopgaps
27749 is_globally_equivalent_to is not symmetric sbrandhorst "{{{
Q = QuadraticForm(ZZ, 2, [2,3,5])
P = QuadraticForm(ZZ, 2, [8,6,5])
Q.is_globally_equivalent_to(P)
True
P.is_globally_equivalent_to(Q)
False
}}}
The expected output in any case is `False`.
The underlying computation is done with Pari.
Upstream ticket (PARI):
- [http://pari.math.u-bordeaux.fr/cgi-bin/bugreport.cgi?bug=2140 PARI bug #2140: Bug: qfisom not symmetric]
" defect closed major sage-9.2 quadratic forms fixed pari slelievre mjo gh-kliem Simon Brandhorst Samuel Lelièvre Fixed upstream, in a later stable release. be9f8807a8e416dc117e010872641da56d2c9a88