Hi Nicolas, > Just to make sure (and for future regression tests), could you send a > little session demonstrating this?
sorry, I changed the code accidentalness in one of my patches to make it work... I undid the changes. After pulling again, you should get the problem I had: sage: ct = CartanType(['A',3]) sage: L = ct.root_system().root_lattice() sage: L.simple_root(1) alpha[1] sage: L.simple_root(1).associated_coroot() ... -> 1777 assert domain.base_ring() == codomain.base_ring() ... AssertionError The reason for the error is as described. > The conceptual way (and thus independent on the realization at hand) > is to take the scalar product of beta with the simple coweight > corresponding to alpha. This should (be made to) work; however there > are things to straighten out around scalar products and coweights ... yes, but currently, such a scalar product is not available, is it? Also conceptually, these coefficients are used to define the coweights, so it seems to me like the wrong way to access them. Or am I wrong? Thanks, Christian -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To post to this group, send email to sage-combinat-devel@googlegroups.com. To unsubscribe from this group, send email to sage-combinat-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-combinat-devel?hl=en.
