src/ZF/Coind/ROOT.ML

try to avoid races again (cf. 8c37cb84065f and fd3a36e48b09);

(*  Title:      ZF/Coind/ROOT.ML
    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).
*)

use_thys ["ECR"];