improved handling of "that": insert into goal, only declare as Pure "intro";
eliminated functor;
(* Title: HOL/Subst/ROOT.ML
ID: $Id$
Authors: Martin Coen, Cambridge University Computer Laboratory
Konrad Slind, TU Munich
Copyright 1993 University of Cambridge,
1996 TU Munich
Substitution and Unification in Higher-Order Logic.
Implements Manna & Waldinger's formalization, with Paulson's simplifications,
and some new simplifications by Slind.
Z Manna & R Waldinger, Deductive Synthesis of the Unification Algorithm.
SCP 1 (1981), 5-48
L C Paulson, Verifying the Unification Algorithm in LCF. SCP 5 (1985), 143-170
AList - association lists
UTerm - data type of terms
Subst - substitutions
Unifier - specification of unification and conditions for
correctness and termination
Unify - the unification function
*)
time_use_thy "Unify";