sage: T.<t1,t2,u1,u2> = QQ[] sage: TJ = Ideal([t1^2 + u1^2 - 1,t2^2 + u2^2 - 1, (t1-t2)^2 + (u1- u2)^2 -1]) sage: TJ.genus() 4294967295 sage: TJ.dimension() 1
I'm very skeptical about that answer (I realize that Singular is doing the calculation) especially since (for example). Even if it's calculating arithmetic genus I can't imagine that that curve could have that many singularities. sage: TK = Ideal([t1^2/4 + u1^2 - 1,t2^2/4 + u2^2 - 1, (t1-t2)^2 + (u1- u2)^2 -1]) sage: TK.genus() 3 sage: TK.dimension() 1 -- 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-support URL: http://www.sagemath.org
