On Tuesday, September 11, 2012 1:03:43 PM UTC+1, John Cremona wrote: > Volker, will you also include what I call seminvariants?
Whats a semi-invariant to you? The leading term of a covariant? sage: R.<a0, a1, a2, a3, a4, x0, x1> = QQ[] sage: quadric = invariant_theory.binary_quartic(a0*x1^4+4*a1*x0*x1^3+6*a2*x0^2*x1^2+4*a3*x0^3*x1+a4*x0^4, x0, x1) sage: quadric.g_covariant().lt() a3^2*x0^4 I don't think they should be methods of polynomials; Is x a linear homogeneous or quadratic inhomogeneous term? -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-devel?hl=en.
