%--------------------------------------------------------------------------
% File     : LAT004-0 : TPTP v8.2.0. Released v2.2.0.
% Domain   : Lattice Theory (Quasilattices)
% Axioms   : Quasilattice theory (equality) axioms
% Version  : [McC98b] (equality) axioms.
% English  :

% Refs     : [McC98] McCune (1998), Email to G. Sutcliffe
%          : [MP96]  McCune & Padmanabhan (1996), Automated Deduction in Eq
% Source   : [McC98]
% Names    :

% Status   : Satisfiable
% Syntax   : Number of clauses     :    8 (   8 unt;   0 nHn;   0 RR)
%            Number of literals    :    8 (   8 equ;   0 neg)
%            Maximal clause size   :    1 (   1 avg)
%            Maximal term depth    :    4 (   2 avg)
%            Number of predicates  :    1 (   0 usr;   0 prp; 2-2 aty)
%            Number of functors    :    2 (   2 usr;   0 con; 2-2 aty)
%            Number of variables   :   18 (   0 sgn)
% SPC      : 

% Comments :
%--------------------------------------------------------------------------
%----Quasilattice theory:
cnf(idempotence_of_meet,axiom,
    meet(X,X) = X ).

cnf(idempotence_of_join,axiom,
    join(X,X) = X ).

cnf(commutativity_of_meet,axiom,
    meet(X,Y) = meet(Y,X) ).

cnf(commutativity_of_join,axiom,
    join(X,Y) = join(Y,X) ).

cnf(associativity_of_meet,axiom,
    meet(meet(X,Y),Z) = meet(X,meet(Y,Z)) ).

cnf(associativity_of_join,axiom,
    join(join(X,Y),Z) = join(X,join(Y,Z)) ).

cnf(quasi_lattice1,axiom,
    join(meet(X,join(Y,Z)),meet(X,Y)) = meet(X,join(Y,Z)) ).

cnf(quasi_lattice2,axiom,
    meet(join(X,meet(Y,Z)),join(X,Y)) = join(X,meet(Y,Z)) ).

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