Hey, I'm pretty sure that's a bug since there is no coercion map between QQ and GF(7) ( which is different than calling GF(7)(1/5) ). Here's some of the other tests I tried:
sage: T=matrix(GF(7),[[1,1],[0,3]]) sage: (N*T).parent() Full MatrixSpace of 2 by 2 dense matrices over Ring of integers modulo 1 sage: T=matrix(GF(2),[[1,1],[0,1]]) sage: (N*T).parent() Full MatrixSpace of 2 by 2 dense matrices over Ring of integers modulo 1 sage: T=matrix(GF(25,'a'),[[1,1],[0,3]]) sage: (N*T).parent() Full MatrixSpace of 2 by 2 dense matrices over Finite Field in a of size 5^2 sage: N*T [1 4] [0 3] So this is something tied to only field of size p. Best, Travis -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel?hl=en. For more options, visit https://groups.google.com/groups/opt_out.