Hi! On 30 Mai, 12:47, amps <arat...@gmail.com> wrote: ... > TypeError: unsupported operand parent(s) for '*': 'Multivariate > Polynomial Ring in z0 over Rational Field' and 'Multivariate > Polynomial Ring in z1 over Rational Field' > sage: > ---------------------------------------- > > Basically, I want to be able to multiply f and g and I can't, probably > because they are not recognized as being in the same polynomial ring.
They are *not* in the same polynomial ring. Continuing your example: sage: g.parent() Multivariate Polynomial Ring in z1 over Rational Field sage: f.parent() Multivariate Polynomial Ring in z0 over Rational Field Hence, f and g live in polynomial rings that are isomorphic but that are certainly not the same: sage: g.parent() == f.parent() False For a similar reason, neither f nor g are elements of R. However, it is possible to convert both f and g into elements of R, and then you can multiply: sage: R(f)*R(g) z0^3*z1^3 Best regards Simon --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
