id summary reporter owner description type status priority milestone component resolution keywords cc merged author reviewer upstream work_issues branch commit dependencies stopgaps
10676 [duplicate] Bizarre results for genus of a singular curve David Loeffler Alex Ghitza "In vanilla Sage 4.6.1:
{{{
sage: R. = QQ[]
sage: C = Curve(x^2 - 2*y^2)
sage: C.is_singular()
True
sage: C.genus()
4294967295
}}}
I'm not quite sure how one defines the genus of a reducible variety, but I'm pretty sure that answer's not right...
(I spotted this during testing #727, but it has nothing to do with conics, of course.)" defect closed major sage-duplicate/invalid/wontfix algebraic geometry duplicate David Loeffler N/A