Hi Neda, On 2013-04-29, Neda <neda.darg...@gmail.com> wrote: > I want to compute S(f,g) , but this command doesn't work and it said there > is no spol command, could you please tell me how can I compute it? > R.<x,y,z>=PolynomialRing(QQ,3,'lex') > f=4*x^2*z-7*y^2 > g=x*y*z^2+3*x*z^4 > spol(f,g)
spol is a function defined in the module sage.rings.polynomial.toy_buchberger. Of course, most functions defined in Sage are not imported into the global namespace when you start the program---otherwise, it would be a total mess. So, you need to import the function first: sage: from sage.rings.polynomial.toy_buchberger import spol sage: R.<x,y,z>=PolynomialRing(QQ,3,'lex') sage: f=4*x^2*z-7*y^2 sage: g=x*y*z^2+3*x*z^4 sage: spol(f,g) -1/3*x^2*y*z^2 - 7/4*y^2*z^3 Note that the functions in toy_buchberger are not intended for an efficient computation of Gröbner bases---that's why it is called "toy". The purpose is educational. Best regards, Simon -- 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 http://groups.google.com/group/sage-support?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
