--On 01 June 2001 17:03 +0100 Phebe Mann <pm258@hermes.cam.ac.uk> wrote: [...] > (SUB rule) > |' |- f : int^k --> (S) int if S' is a subset of S > ----------------------------- > |' |- f : int^k --> (S') int > where S' is a subset of S [...] That's wrong. Raymond's answer was already 100% correct (I believe). Mo