Hi all, I am trying to use sage to compute the Artin-Wedderburn decomposition of a group algebra. Since I need exact expressions I am working over QQbar rather than over CC. When trying to compute the idempotents I get an error resulting from an attempt to coerce a rational number into QQbar. A minimal exaple follows:
sage: G = SymmetricGroup(3) sage: K = QQbar sage: A = GroupAlgebra(G,K) sage: characters = G.irreducible_characters() sage: idims = [1/x(G(1)) for x in characters] sage: K(idims[0]) Traceback (most recent call last): ... TypeError: Illegal initializer for algebraic number Observe that in this situation the numbers I am trying to coerce into K are rational: sage: idims [1, 1/2, 1] Is this a bug or a feature of QQbar? Cheers J -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
