Added constant abs.
(* Title: HOL/Induct/ROOT
ID: $Id$
Author: Lawrence C Paulson, Cambridge University Computer Laboratory
Copyright 1997 University of Cambridge
Examples of Inductive and Coinductive Definitions
*)
writeln"Root file for HOL/Induct";
set proof_timing;
time_use_thy "Perm";
time_use_thy "Comb";
time_use_thy "Mutil";
time_use_thy "Acc";
time_use_thy "Multiset";
time_use_thy "PropLog";
time_use_thy "SList";
time_use_thy "LFilter";
time_use_thy "Term";
time_use_thy "ABexp";
time_use_thy "Exp";
time_use_thy "Tree";