(* Title: HOL/RelPow.thy
ID: $Id$
Author: Tobias Nipkow
Copyright 1996 TU Muenchen
R^n = R O ... O R, the n-fold composition of R
*)
RelPow = Nat +
instance
set :: (term) {power} (* only ('a * 'a) set should be in power! *)
primrec (relpow)
"R^0 = Id"
"R^(Suc n) = R O (R^n)"
end