> >> Let A be a matrix not over ZZ or QQ: > > >> A.adjoint() > >> A.inverse() > > >> are not implemented. > > > I don't think they should be. There are already (at least) 3 ways > > to do this: > > Wait a sec.... I agree with David K on the adjoint issue. The adjoint > doesn't require the fraction field to even be constructed, and it > makes perfect sense over non-domains. > > > sage: A = random_matrix(ZZ,2) > > sage: ~A > > > [ 1/34 1/17] > > [-6/17 5/17] > > sage: A.__invert__() > > > [ 1/34 1/17] > > [-6/17 5/17] > > sage: A^(-1) > > > [ 1/34 1/17] > > [-6/17 5/17] > > I vaguely recall being stung several times by the lack of an inverse > () method. For someone who doesn't know python that well, neither ~ > nor __invert__ are obvious alternatives. I don't think it would hurt > at all to have an inverse() method.
I actually think both should be methods, just because ~ and ^(-1) don't show up on tab completion... --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
