On Mon, Mar 18, 2019 at 1:01 PM Rachel Player <rachelpla...@gmail.com> wrote: > > I'd like to "remove squares" in some polynomials living in a polynomial ring > over QQ, in 2 variables: x,y. I tried to implement this by modding out by the > ideal (x^2 - x, y^2 - y). However, I have found that depending on the > ordering, the result of .mod() does not always output the polynomial I am > looking for.
Thanks. This looks like a bug to me. Specifically, a bug in Singular, or in Singular interface to Sage, as if I do R2.<s,t>=PolynomialRing(QQ,2,order="lex", implementation="generic") then things work. (this is a slow Python implementation then) Care to open a trac ticket? Dima > > Please see attached for a code example: in the ring R2, the order is > specified as lex, and the polynomial x + y^2 does not reduce to x + y I would > like. This issue does not come up for the ring R1 (no ordering specified > explicitly), where both x + y^2 and x^2 + y reduce to x + y as expected. > > Is there a way to force reduction even for the non-leading terms? > > Thanks, > Rachel > > > -- > You received this message because you are subscribed to the Google Groups > "sage-support" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-support+unsubscr...@googlegroups.com. > To post to this group, send email to sage-support@googlegroups.com. > Visit this group at https://groups.google.com/group/sage-support. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
