Hi, i don't really know whether this is a bug, but at least it seems a bit odd to me (are alphacheck supposed to have different meanings in the spaces?):
R = RootSystem(['A',3]) wgtsp = R.weight_space() rootsp = R.root_space() a = wgtsp.simple_roots()[1] b = rootsp.simple_roots()[1] a.associated_coroot() >> 4/5*alphacheck[1] - 2/5*alphacheck[2] b.associated_coroot() >> alphacheck[1] In general is there a way to specify a basis of a ?free module? (whatever is behind the spaces) and make sage express everything in this basis? Best regards Matthias -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
