Hi there, I am trying to do some symbolic calculations using dual number algebra. I start with
S.<E> = PolynomialRing( QQ ) R.<e> = S.quotient( E^2 ) which allows me to get the dual `e` to behave as expected: sage: e == 0 False sage: e*e == 0 True Now I want to create to symbolic matrices, `A` and `B`, that do not commute. I do it this way: MATS.<A, B>=FreeAlgebra(R) So that I can, for example, create the matrix M = A + B * e Now the dual thing works with explicit values, e.g., sage: (2 + 3 * e)^(-1) -3/4*e + 1/2 But it fails with my matrix M: sage: M^(-1) --------------------------------------------------------------------------- AttributeError (I would like it to output, e.g., `(1 + e * A^(-1) * B) * A^(-1) ` instead, or `1/A + e * B / A^2`) Anybody can help me figure this out? -- 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.
