(* Title: HOL/Subst
Author: Martin Coen, Cambridge University Computer Laboratory
Copyright 1993 University of Cambridge
Substitution and Unification in Higher-Order Logic.
Implements Manna & Waldinger's formalization, with Paulson's simplifications:
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
setplus - minor additions to HOL's set theory
alist - association lists
uterm - inductive data type of terms
utlemmas - definition of occurs and vars_of for terms
subst - substitutions
unifier - specification of unification and conditions for
correctness and termination
To load, go to the parent directory and type use"Substitutions/ROOT.ML";
*)
HOL_build_completed; (*Cause examples to fail if HOL did*)
writeln"Root file for Substitutions and Unification";
use_thy "Subst/Setplus";
use_thy "Subst/AList";
use_thy "Subst/UTerm";
use_thy "Subst/UTLemmas";
use_thy "Subst/Subst";
use_thy "Subst/Unifier";
writeln"END: Root file for Substitutions and Unification";