Can someone please clarify: How is the following supposed to work? sage: Sx.<x> = ZZ[]; Sxy.<y> = Sx[]; Sxyz.<z> = Sxy[] sage: p = 1 + x*y + x*z + y*z^2 sage: P = p.integral(x) sage: from sage.misc.derivative import multi_derivative sage: multi_derivative(P,(x,))
In my understanding it cannot work because P has the innermost ring over ZZ replaced with one over QQ, having a different generator. Consequently, multi_derivative should complain because its argument x is still the generator of Sx. I'm asking because there are doctests depending on the (perceived) wrong behaviour (ie., that multi_derivative() does not complain) and which trigger with some experimental code. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
