(* Title: ZF/Coind/MT.ML ID: $Id: ROOT.ML,v 1.9 2001/12/25 09:02:03 paulson Exp $ Author: Jacob Frost, Cambridge University Computer Laboratory Copyright 1995 University of Cambridge Based upon the article Robin Milner and Mads Tofte, Co-induction in Relational Semantics, Theoretical Computer Science 87 (1991), pages 209-220. Written up as Jacob Frost, A Case Study of Co_induction in Isabelle Report, Computer Lab, University of Cambridge (1995). *) time_use_thy "ECR";