Start with g = SymmetricGroup(3) chi = g.trivial_character() u = g.subgroup([])
Next reg = u.trivial_character().induct(g) print(chi.scalar_product(reg)) yields as expected the answer 1. Now repeat the very same two lines, but before doing so compute the representatives of conjugacy classes of subgroups: lg = g.conjugacy_classes_subgroups() reg = u.trivial_character().induct(g) print(chi.scalar_product(reg)) This results in --------------------------------------------------------------------------- GAPError Traceback (most recent call last) [...] GAPError: Error, no method found! Error, no 1st choice method found for `=' on 2 arguments I omit the full traceback, because it is very well reproducible in versions 9.7 and 9.8.beta3, and also on the SageCell. -- Peter Müller -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/d381c4c3-0a3a-495b-8953-4802639ede50n%40googlegroups.com.
