%------------------------------------------------------------------------------
% File : Twee---2.7
% Problem : LAT212-1 : TPTP v9.3.1. Released v3.1.0.
% Transfm : none
% Format : tptp:raw
% Command : run_twee /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n012.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8046.5625MB
% OS : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Tue Sep 29 11:44:33 AM UTC 2026
% Result : Unsatisfiable 57.88s 7.69s
% Output : Proof 58.64s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.01 % Problem : LAT212-1 : TPTP v9.3.1. Released v3.1.0.
% 0.00/0.02 % Command : run_twee /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.03/0.30 % Computer : n012.cluster.edu
% 0.03/0.30 % Model : x86_64 x86_64
% 0.03/0.30 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.03/0.30 % Memory : 8046.5625MB
% 0.03/0.30 % OS : Linux 6.8.0-71-generic
% 0.03/0.30 % CPULimit : 300
% 0.03/0.30 % WCLimit : 300
% 0.03/0.30 % DateTime : Sun Sep 27 14:05:49 UTC 2026
% 0.03/0.30 % CPUTime :
% 0.03/0.30 Running run_twee /export/starexec/sandbox/benchmark/theBenchmark.p
% 57.88/7.69 Command-line arguments: --no-flatten-goal
% 57.88/7.69
% 57.88/7.69 % SZS status Unsatisfiable
% 57.88/7.69
% 58.64/7.73 % SZS output start Proof
% 58.64/7.73 Axiom 1 (idempotence_of_join): join(X, X) = X.
% 58.64/7.73 Axiom 2 (commutativity_of_join): join(X, Y) = join(Y, X).
% 58.64/7.73 Axiom 3 (complement_join): join(X, complement(X)) = one.
% 58.64/7.73 Axiom 4 (commutativity_of_meet): meet(X, Y) = meet(Y, X).
% 58.64/7.73 Axiom 5 (complement_meet): meet(X, complement(X)) = zero.
% 58.64/7.73 Axiom 6 (ifeq_axiom): ifeq(X, X, Y, Z) = Y.
% 58.64/7.73 Axiom 7 (absorption2): join(X, meet(X, Y)) = X.
% 58.64/7.73 Axiom 8 (associativity_of_join): join(join(X, Y), Z) = join(X, join(Y, Z)).
% 58.64/7.73 Axiom 9 (absorption1): meet(X, join(X, Y)) = X.
% 58.64/7.73 Axiom 10 (associativity_of_meet): meet(meet(X, Y), Z) = meet(X, meet(Y, Z)).
% 58.64/7.73 Axiom 11 (meet_join_complement): ifeq(join(X, Y), one, ifeq(meet(X, Y), zero, complement(X), Y), Y) = Y.
% 58.64/7.73 Axiom 12 (equation_H70): meet(X, join(Y, meet(Z, join(Y, W)))) = meet(X, join(Y, meet(Z, join(W, meet(Y, join(X, Z)))))).
% 58.64/7.73
% 58.64/7.73 Lemma 13: join(X, zero) = X.
% 58.64/7.73 Proof:
% 58.64/7.73 join(X, zero)
% 58.64/7.73 = { by axiom 5 (complement_meet) R->L }
% 58.64/7.73 join(X, meet(X, complement(X)))
% 58.64/7.73 = { by axiom 7 (absorption2) }
% 58.64/7.73 X
% 58.64/7.73
% 58.64/7.73 Lemma 14: join(zero, X) = X.
% 58.64/7.73 Proof:
% 58.64/7.73 join(zero, X)
% 58.64/7.73 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.73 join(X, zero)
% 58.64/7.74 = { by lemma 13 }
% 58.64/7.74 X
% 58.64/7.74
% 58.64/7.74 Lemma 15: complement(zero) = one.
% 58.64/7.74 Proof:
% 58.64/7.74 complement(zero)
% 58.64/7.74 = { by lemma 14 R->L }
% 58.64/7.74 join(zero, complement(zero))
% 58.64/7.74 = { by axiom 3 (complement_join) }
% 58.64/7.74 one
% 58.64/7.74
% 58.64/7.74 Lemma 16: meet(X, one) = X.
% 58.64/7.74 Proof:
% 58.64/7.74 meet(X, one)
% 58.64/7.74 = { by axiom 3 (complement_join) R->L }
% 58.64/7.74 meet(X, join(X, complement(X)))
% 58.64/7.74 = { by axiom 9 (absorption1) }
% 58.64/7.74 X
% 58.64/7.74
% 58.64/7.74 Lemma 17: meet(X, zero) = zero.
% 58.64/7.74 Proof:
% 58.64/7.74 meet(X, zero)
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 meet(zero, X)
% 58.64/7.74 = { by lemma 14 R->L }
% 58.64/7.74 join(zero, meet(zero, X))
% 58.64/7.74 = { by axiom 7 (absorption2) }
% 58.64/7.74 zero
% 58.64/7.74
% 58.64/7.74 Lemma 18: join(X, one) = one.
% 58.64/7.74 Proof:
% 58.64/7.74 join(X, one)
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 join(one, X)
% 58.64/7.74 = { by lemma 16 R->L }
% 58.64/7.74 join(one, meet(X, one))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.74 join(one, meet(one, X))
% 58.64/7.74 = { by axiom 7 (absorption2) }
% 58.64/7.74 one
% 58.64/7.74
% 58.64/7.74 Lemma 19: meet(X, meet(Y, Z)) = meet(Y, meet(X, Z)).
% 58.64/7.74 Proof:
% 58.64/7.74 meet(X, meet(Y, Z))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 meet(meet(Y, Z), X)
% 58.64/7.74 = { by axiom 10 (associativity_of_meet) }
% 58.64/7.74 meet(Y, meet(Z, X))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.74 meet(Y, meet(X, Z))
% 58.64/7.74
% 58.64/7.74 Lemma 20: meet(X, join(Y, X)) = X.
% 58.64/7.74 Proof:
% 58.64/7.74 meet(X, join(Y, X))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 meet(X, join(X, Y))
% 58.64/7.74 = { by axiom 9 (absorption1) }
% 58.64/7.74 X
% 58.64/7.74
% 58.64/7.74 Lemma 21: join(X, meet(Y, X)) = X.
% 58.64/7.74 Proof:
% 58.64/7.74 join(X, meet(Y, X))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 join(X, meet(X, Y))
% 58.64/7.74 = { by axiom 7 (absorption2) }
% 58.64/7.74 X
% 58.64/7.74
% 58.64/7.74 Lemma 22: join(meet(X, Y), meet(X, join(Z, meet(X, Y)))) = meet(X, join(Z, meet(X, Y))).
% 58.64/7.74 Proof:
% 58.64/7.74 join(meet(X, Y), meet(X, join(Z, meet(X, Y))))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 join(meet(Y, X), meet(X, join(Z, meet(X, Y))))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 join(meet(Y, X), meet(X, join(Z, meet(Y, X))))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 join(meet(X, join(Z, meet(Y, X))), meet(Y, X))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 join(meet(X, join(Z, meet(Y, X))), meet(X, Y))
% 58.64/7.74 = { by axiom 9 (absorption1) R->L }
% 58.64/7.74 join(meet(X, join(Z, meet(Y, X))), meet(meet(X, Y), join(meet(X, Y), Z)))
% 58.64/7.74 = { by axiom 10 (associativity_of_meet) }
% 58.64/7.74 join(meet(X, join(Z, meet(Y, X))), meet(X, meet(Y, join(meet(X, Y), Z))))
% 58.64/7.74 = { by lemma 19 }
% 58.64/7.74 join(meet(X, join(Z, meet(Y, X))), meet(Y, meet(X, join(meet(X, Y), Z))))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) }
% 58.64/7.74 join(meet(X, join(Z, meet(Y, X))), meet(Y, meet(X, join(Z, meet(X, Y)))))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.74 join(meet(X, join(Z, meet(Y, X))), meet(Y, meet(X, join(Z, meet(Y, X)))))
% 58.64/7.74 = { by lemma 21 }
% 58.64/7.74 meet(X, join(Z, meet(Y, X)))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.74 meet(X, join(Z, meet(X, Y)))
% 58.64/7.74
% 58.64/7.74 Lemma 23: join(Y, join(X, Z)) = join(X, join(Y, Z)).
% 58.64/7.74 Proof:
% 58.64/7.74 join(Y, join(X, Z))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 join(join(X, Z), Y)
% 58.64/7.74 = { by axiom 8 (associativity_of_join) }
% 58.64/7.74 join(X, join(Z, Y))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) }
% 58.64/7.74 join(X, join(Y, Z))
% 58.64/7.74
% 58.64/7.74 Lemma 24: join(X, join(Y, meet(Z, join(X, Y)))) = join(X, Y).
% 58.64/7.74 Proof:
% 58.64/7.74 join(X, join(Y, meet(Z, join(X, Y))))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 join(X, join(Y, meet(Z, join(Y, X))))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 join(X, join(Y, meet(join(Y, X), Z)))
% 58.64/7.74 = { by lemma 23 }
% 58.64/7.74 join(Y, join(X, meet(join(Y, X), Z)))
% 58.64/7.74 = { by axiom 8 (associativity_of_join) R->L }
% 58.64/7.74 join(join(Y, X), meet(join(Y, X), Z))
% 58.64/7.74 = { by axiom 7 (absorption2) }
% 58.64/7.74 join(Y, X)
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) }
% 58.64/7.74 join(X, Y)
% 58.64/7.74
% 58.64/7.74 Lemma 25: join(X, meet(Y, join(X, meet(Y, Z)))) = join(X, meet(Y, Z)).
% 58.64/7.74 Proof:
% 58.64/7.74 join(X, meet(Y, join(X, meet(Y, Z))))
% 58.64/7.74 = { by lemma 22 R->L }
% 58.64/7.74 join(X, join(meet(Y, Z), meet(Y, join(X, meet(Y, Z)))))
% 58.64/7.74 = { by lemma 24 }
% 58.64/7.74 join(X, meet(Y, Z))
% 58.64/7.74
% 58.64/7.74 Lemma 26: join(X, meet(Y, join(Z, meet(X, Y)))) = join(X, meet(Y, join(X, Z))).
% 58.64/7.74 Proof:
% 58.64/7.74 join(X, meet(Y, join(Z, meet(X, Y))))
% 58.64/7.74 = { by axiom 1 (idempotence_of_join) R->L }
% 58.64/7.74 join(X, meet(Y, join(Z, meet(X, join(Y, Y)))))
% 58.64/7.74 = { by lemma 25 R->L }
% 58.64/7.74 join(X, meet(Y, join(X, meet(Y, join(Z, meet(X, join(Y, Y)))))))
% 58.64/7.74 = { by axiom 12 (equation_H70) R->L }
% 58.64/7.74 join(X, meet(Y, join(X, meet(Y, join(X, Z)))))
% 58.64/7.74 = { by lemma 25 }
% 58.64/7.74 join(X, meet(Y, join(X, Z)))
% 58.64/7.74
% 58.64/7.74 Lemma 27: join(X, meet(complement(X), join(X, Y))) = join(X, meet(Y, complement(X))).
% 58.64/7.74 Proof:
% 58.64/7.74 join(X, meet(complement(X), join(X, Y)))
% 58.64/7.74 = { by lemma 26 R->L }
% 58.64/7.74 join(X, meet(complement(X), join(Y, meet(X, complement(X)))))
% 58.64/7.74 = { by axiom 5 (complement_meet) }
% 58.64/7.74 join(X, meet(complement(X), join(Y, zero)))
% 58.64/7.74 = { by lemma 13 }
% 58.64/7.74 join(X, meet(complement(X), Y))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.74 join(X, meet(Y, complement(X)))
% 58.64/7.74
% 58.64/7.74 Lemma 28: join(X, meet(complement(X), join(Y, X))) = join(X, meet(Y, complement(X))).
% 58.64/7.74 Proof:
% 58.64/7.74 join(X, meet(complement(X), join(Y, X)))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 join(X, meet(complement(X), join(X, Y)))
% 58.64/7.74 = { by lemma 27 }
% 58.64/7.74 join(X, meet(Y, complement(X)))
% 58.64/7.74
% 58.64/7.74 Lemma 29: meet(X, meet(Y, complement(X))) = zero.
% 58.64/7.74 Proof:
% 58.64/7.74 meet(X, meet(Y, complement(X)))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 meet(X, meet(complement(X), Y))
% 58.64/7.74 = { by axiom 10 (associativity_of_meet) R->L }
% 58.64/7.74 meet(meet(X, complement(X)), Y)
% 58.64/7.74 = { by axiom 5 (complement_meet) }
% 58.64/7.74 meet(zero, Y)
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 meet(Y, zero)
% 58.64/7.74 = { by lemma 17 }
% 58.64/7.74 zero
% 58.64/7.74
% 58.64/7.74 Lemma 30: meet(X, complement(complement(X))) = complement(complement(X)).
% 58.64/7.74 Proof:
% 58.64/7.74 meet(X, complement(complement(X)))
% 58.64/7.74 = { by axiom 11 (meet_join_complement) R->L }
% 58.64/7.74 ifeq(join(complement(X), meet(X, complement(complement(X)))), one, ifeq(meet(complement(X), meet(X, complement(complement(X)))), zero, complement(complement(X)), meet(X, complement(complement(X)))), meet(X, complement(complement(X))))
% 58.64/7.74 = { by lemma 28 R->L }
% 58.64/7.74 ifeq(join(complement(X), meet(complement(complement(X)), join(X, complement(X)))), one, ifeq(meet(complement(X), meet(X, complement(complement(X)))), zero, complement(complement(X)), meet(X, complement(complement(X)))), meet(X, complement(complement(X))))
% 58.64/7.74 = { by axiom 3 (complement_join) }
% 58.64/7.74 ifeq(join(complement(X), meet(complement(complement(X)), one)), one, ifeq(meet(complement(X), meet(X, complement(complement(X)))), zero, complement(complement(X)), meet(X, complement(complement(X)))), meet(X, complement(complement(X))))
% 58.64/7.74 = { by lemma 16 }
% 58.64/7.74 ifeq(join(complement(X), complement(complement(X))), one, ifeq(meet(complement(X), meet(X, complement(complement(X)))), zero, complement(complement(X)), meet(X, complement(complement(X)))), meet(X, complement(complement(X))))
% 58.64/7.74 = { by axiom 3 (complement_join) }
% 58.64/7.74 ifeq(one, one, ifeq(meet(complement(X), meet(X, complement(complement(X)))), zero, complement(complement(X)), meet(X, complement(complement(X)))), meet(X, complement(complement(X))))
% 58.64/7.74 = { by axiom 6 (ifeq_axiom) }
% 58.64/7.74 ifeq(meet(complement(X), meet(X, complement(complement(X)))), zero, complement(complement(X)), meet(X, complement(complement(X))))
% 58.64/7.74 = { by lemma 29 }
% 58.64/7.74 ifeq(zero, zero, complement(complement(X)), meet(X, complement(complement(X))))
% 58.64/7.74 = { by axiom 6 (ifeq_axiom) }
% 58.64/7.74 complement(complement(X))
% 58.64/7.74
% 58.64/7.74 Lemma 31: meet(X, meet(Y, join(X, Z))) = meet(X, Y).
% 58.64/7.74 Proof:
% 58.64/7.74 meet(X, meet(Y, join(X, Z)))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 meet(X, meet(join(X, Z), Y))
% 58.64/7.74 = { by axiom 10 (associativity_of_meet) R->L }
% 58.64/7.74 meet(meet(X, join(X, Z)), Y)
% 58.64/7.74 = { by axiom 9 (absorption1) }
% 58.64/7.74 meet(X, Y)
% 58.64/7.74
% 58.64/7.74 Lemma 32: meet(join(X, Y), join(X, meet(join(X, Y), Z))) = join(X, meet(Z, join(X, Y))).
% 58.64/7.74 Proof:
% 58.64/7.74 meet(join(X, Y), join(X, meet(join(X, Y), Z)))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 meet(join(X, Y), join(X, meet(Z, join(X, Y))))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 meet(join(Y, X), join(X, meet(Z, join(X, Y))))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 meet(join(Y, X), join(X, meet(Z, join(Y, X))))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.74 meet(join(X, meet(Z, join(Y, X))), join(Y, X))
% 58.64/7.74 = { by lemma 24 R->L }
% 58.64/7.74 meet(join(X, meet(Z, join(Y, X))), join(Y, join(X, meet(Z, join(Y, X)))))
% 58.64/7.74 = { by lemma 20 }
% 58.64/7.74 join(X, meet(Z, join(Y, X)))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) }
% 58.64/7.74 join(X, meet(Z, join(X, Y)))
% 58.64/7.74
% 58.64/7.74 Lemma 33: join(X, join(Y, meet(X, Z))) = join(X, Y).
% 58.64/7.74 Proof:
% 58.64/7.74 join(X, join(Y, meet(X, Z)))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 join(X, join(meet(X, Z), Y))
% 58.64/7.74 = { by axiom 8 (associativity_of_join) R->L }
% 58.64/7.74 join(join(X, meet(X, Z)), Y)
% 58.64/7.74 = { by axiom 7 (absorption2) }
% 58.64/7.74 join(X, Y)
% 58.64/7.74
% 58.64/7.74 Lemma 34: join(X, join(meet(X, Y), Z)) = join(X, Z).
% 58.64/7.74 Proof:
% 58.64/7.74 join(X, join(meet(X, Y), Z))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 join(X, join(Z, meet(X, Y)))
% 58.64/7.74 = { by lemma 33 }
% 58.64/7.74 join(X, Z)
% 58.64/7.74
% 58.64/7.74 Lemma 35: meet(X, meet(Y, complement(meet(X, Y)))) = zero.
% 58.64/7.74 Proof:
% 58.64/7.74 meet(X, meet(Y, complement(meet(X, Y))))
% 58.64/7.74 = { by axiom 10 (associativity_of_meet) R->L }
% 58.64/7.74 meet(meet(X, Y), complement(meet(X, Y)))
% 58.64/7.74 = { by axiom 5 (complement_meet) }
% 58.64/7.74 zero
% 58.64/7.74
% 58.64/7.74 Lemma 36: meet(join(X, Y), complement(join(X, meet(Y, complement(X))))) = zero.
% 58.64/7.74 Proof:
% 58.64/7.74 meet(join(X, Y), complement(join(X, meet(Y, complement(X)))))
% 58.64/7.74 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.74 meet(join(Y, X), complement(join(X, meet(Y, complement(X)))))
% 58.64/7.74 = { by axiom 6 (ifeq_axiom) R->L }
% 58.64/7.74 meet(join(Y, X), ifeq(zero, zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.74 = { by lemma 29 R->L }
% 58.64/7.74 meet(join(Y, X), ifeq(meet(join(X, meet(Y, complement(X))), meet(complement(meet(join(X, meet(Y, complement(X))), X)), complement(join(X, meet(Y, complement(X)))))), zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.74 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.74 meet(join(Y, X), ifeq(meet(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.74 = { by axiom 6 (ifeq_axiom) R->L }
% 58.64/7.74 meet(join(Y, X), ifeq(one, one, ifeq(meet(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.74 = { by axiom 3 (complement_join) R->L }
% 58.64/7.74 meet(join(Y, X), ifeq(join(join(X, meet(Y, complement(X))), complement(join(X, meet(Y, complement(X))))), one, ifeq(meet(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.74 = { by lemma 16 R->L }
% 58.64/7.75 meet(join(Y, X), ifeq(join(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), one)), one, ifeq(meet(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.75 = { by lemma 18 R->L }
% 58.64/7.75 meet(join(Y, X), ifeq(join(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), join(join(X, meet(Y, complement(X))), one))), one, ifeq(meet(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.75 = { by axiom 3 (complement_join) R->L }
% 58.64/7.75 meet(join(Y, X), ifeq(join(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), join(join(X, meet(Y, complement(X))), join(meet(join(X, meet(Y, complement(X))), X), complement(meet(join(X, meet(Y, complement(X))), X)))))), one, ifeq(meet(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.75 = { by lemma 34 }
% 58.64/7.75 meet(join(Y, X), ifeq(join(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), join(join(X, meet(Y, complement(X))), complement(meet(join(X, meet(Y, complement(X))), X))))), one, ifeq(meet(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.75 = { by lemma 27 }
% 58.64/7.75 meet(join(Y, X), ifeq(join(join(X, meet(Y, complement(X))), meet(complement(meet(join(X, meet(Y, complement(X))), X)), complement(join(X, meet(Y, complement(X)))))), one, ifeq(meet(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.75 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.75 meet(join(Y, X), ifeq(join(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), one, ifeq(meet(join(X, meet(Y, complement(X))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), zero, complement(join(X, meet(Y, complement(X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X)))))
% 58.64/7.75 = { by axiom 11 (meet_join_complement) }
% 58.64/7.75 meet(join(Y, X), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(join(X, meet(Y, complement(X))), X))))
% 58.64/7.75 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.75 meet(join(Y, X), meet(complement(join(X, meet(Y, complement(X)))), complement(meet(X, join(X, meet(Y, complement(X)))))))
% 58.64/7.75 = { by axiom 9 (absorption1) }
% 58.64/7.75 meet(join(Y, X), meet(complement(join(X, meet(Y, complement(X)))), complement(X)))
% 58.64/7.75 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.75 meet(join(Y, X), meet(complement(X), complement(join(X, meet(Y, complement(X))))))
% 58.64/7.75 = { by lemma 20 R->L }
% 58.64/7.75 meet(join(Y, X), meet(complement(X), complement(meet(join(X, meet(Y, complement(X))), join(Y, join(X, meet(Y, complement(X))))))))
% 58.64/7.75 = { by lemma 33 }
% 58.64/7.75 meet(join(Y, X), meet(complement(X), complement(meet(join(X, meet(Y, complement(X))), join(Y, X)))))
% 58.64/7.75 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.75 meet(join(Y, X), meet(complement(X), complement(meet(join(Y, X), join(X, meet(Y, complement(X)))))))
% 58.64/7.75 = { by lemma 28 R->L }
% 58.64/7.75 meet(join(Y, X), meet(complement(X), complement(meet(join(Y, X), join(X, meet(complement(X), join(Y, X)))))))
% 58.64/7.75 = { by lemma 19 R->L }
% 58.64/7.75 meet(complement(X), meet(join(Y, X), complement(meet(join(Y, X), join(X, meet(complement(X), join(Y, X)))))))
% 58.64/7.75 = { by axiom 10 (associativity_of_meet) R->L }
% 58.64/7.75 meet(meet(complement(X), join(Y, X)), complement(meet(join(Y, X), join(X, meet(complement(X), join(Y, X))))))
% 58.64/7.75 = { by lemma 31 R->L }
% 58.64/7.75 meet(meet(complement(X), join(Y, X)), meet(complement(meet(join(Y, X), join(X, meet(complement(X), join(Y, X))))), join(meet(complement(X), join(Y, X)), X)))
% 58.64/7.75 = { by axiom 10 (associativity_of_meet) }
% 58.64/7.75 meet(complement(X), meet(join(Y, X), meet(complement(meet(join(Y, X), join(X, meet(complement(X), join(Y, X))))), join(meet(complement(X), join(Y, X)), X))))
% 58.64/7.75 = { by axiom 2 (commutativity_of_join) }
% 58.64/7.75 meet(complement(X), meet(join(Y, X), meet(complement(meet(join(Y, X), join(X, meet(complement(X), join(Y, X))))), join(X, meet(complement(X), join(Y, X))))))
% 58.64/7.75 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.75 meet(complement(X), meet(join(Y, X), meet(join(X, meet(complement(X), join(Y, X))), complement(meet(join(Y, X), join(X, meet(complement(X), join(Y, X))))))))
% 58.64/7.75 = { by lemma 35 }
% 58.64/7.75 meet(complement(X), zero)
% 58.64/7.75 = { by lemma 17 }
% 58.64/7.75 zero
% 58.64/7.75
% 58.64/7.75 Lemma 37: join(X, meet(Y, meet(Z, complement(X)))) = join(X, meet(Y, Z)).
% 58.64/7.75 Proof:
% 58.64/7.75 join(X, meet(Y, meet(Z, complement(X))))
% 58.64/7.75 = { by lemma 19 R->L }
% 58.64/7.75 join(X, meet(Z, meet(Y, complement(X))))
% 58.64/7.75 = { by axiom 10 (associativity_of_meet) R->L }
% 58.64/7.75 join(X, meet(meet(Z, Y), complement(X)))
% 58.64/7.75 = { by axiom 7 (absorption2) R->L }
% 58.64/7.75 join(join(X, meet(meet(Z, Y), complement(X))), meet(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(X, meet(meet(Z, Y), complement(X)))))))
% 58.64/7.75 = { by lemma 30 }
% 58.64/7.75 join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(X, meet(meet(Z, Y), complement(X))))))
% 58.64/7.75 = { by axiom 1 (idempotence_of_join) R->L }
% 58.64/7.75 join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))
% 58.64/7.75 = { by axiom 11 (meet_join_complement) R->L }
% 58.64/7.75 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), one, ifeq(meet(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.75 = { by lemma 30 R->L }
% 58.64/7.75 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), one, ifeq(meet(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), meet(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))), zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.75 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.75 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), one, ifeq(meet(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))), zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.75 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.75 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), one, ifeq(meet(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by lemma 24 R->L }
% 58.64/7.76 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), one, ifeq(meet(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), complement(join(join(X, meet(meet(Z, Y), complement(X))), join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))), zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.76 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), one, ifeq(meet(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), complement(join(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(X, meet(meet(Z, Y), complement(X)))))), zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by lemma 31 R->L }
% 58.64/7.76 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), one, ifeq(meet(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), meet(complement(join(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(X, meet(meet(Z, Y), complement(X))))), join(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(X, meet(meet(Z, Y), complement(X)))))), zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.76 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), one, ifeq(meet(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), meet(join(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(X, meet(meet(Z, Y), complement(X)))), complement(join(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(X, meet(meet(Z, Y), complement(X))))))), zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by axiom 5 (complement_meet) }
% 58.64/7.76 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), one, ifeq(meet(join(join(X, meet(meet(Z, Y), complement(X))), meet(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), zero), zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by lemma 17 }
% 58.64/7.76 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), one, ifeq(zero, zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.76 ifeq(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), join(complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(X, meet(meet(Z, Y), complement(X))))), one, ifeq(zero, zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by axiom 8 (associativity_of_join) R->L }
% 58.64/7.76 ifeq(join(join(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))), join(X, meet(meet(Z, Y), complement(X)))), one, ifeq(zero, zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by axiom 3 (complement_join) }
% 58.64/7.76 ifeq(join(one, join(X, meet(meet(Z, Y), complement(X)))), one, ifeq(zero, zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.76 ifeq(join(join(X, meet(meet(Z, Y), complement(X))), one), one, ifeq(zero, zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by lemma 18 }
% 58.64/7.76 ifeq(one, one, ifeq(zero, zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by axiom 6 (ifeq_axiom) }
% 58.64/7.76 ifeq(zero, zero, complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X)))))), join(join(X, meet(meet(Z, Y), complement(X))), complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by axiom 6 (ifeq_axiom) }
% 58.64/7.76 complement(complement(join(join(X, meet(meet(Z, Y), complement(X))), join(X, meet(meet(Z, Y), complement(X))))))
% 58.64/7.76 = { by axiom 1 (idempotence_of_join) }
% 58.64/7.76 complement(complement(join(X, meet(meet(Z, Y), complement(X)))))
% 58.64/7.76 = { by lemma 16 R->L }
% 58.64/7.76 complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), one))
% 58.64/7.76 = { by lemma 15 R->L }
% 58.64/7.76 complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(zero)))
% 58.64/7.76 = { by lemma 36 R->L }
% 58.64/7.76 complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X))))))))
% 58.64/7.76 = { by axiom 6 (ifeq_axiom) R->L }
% 58.64/7.76 ifeq(one, one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.76 = { by lemma 18 R->L }
% 58.64/7.76 ifeq(join(meet(Z, Y), one), one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.76 = { by axiom 3 (complement_join) R->L }
% 58.64/7.76 ifeq(join(meet(Z, Y), join(join(X, meet(meet(Z, Y), complement(X))), complement(join(X, meet(meet(Z, Y), complement(X)))))), one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.76 = { by axiom 8 (associativity_of_join) }
% 58.64/7.76 ifeq(join(meet(Z, Y), join(X, join(meet(meet(Z, Y), complement(X)), complement(join(X, meet(meet(Z, Y), complement(X))))))), one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.76 = { by lemma 23 R->L }
% 58.64/7.76 ifeq(join(X, join(meet(Z, Y), join(meet(meet(Z, Y), complement(X)), complement(join(X, meet(meet(Z, Y), complement(X))))))), one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.76 = { by lemma 34 }
% 58.64/7.76 ifeq(join(X, join(meet(Z, Y), complement(join(X, meet(meet(Z, Y), complement(X)))))), one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.76 = { by lemma 16 R->L }
% 58.64/7.76 ifeq(join(X, join(meet(Z, Y), meet(complement(join(X, meet(meet(Z, Y), complement(X)))), one))), one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.76 = { by lemma 15 R->L }
% 58.64/7.77 ifeq(join(X, join(meet(Z, Y), meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(zero)))), one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.77 = { by axiom 8 (associativity_of_join) R->L }
% 58.64/7.77 ifeq(join(join(X, meet(Z, Y)), meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(zero))), one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.77 = { by lemma 36 R->L }
% 58.64/7.77 ifeq(join(join(X, meet(Z, Y)), meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.77 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.77 ifeq(join(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X))))))), join(X, meet(Z, Y))), one, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y)))
% 58.64/7.77 = { by axiom 6 (ifeq_axiom) R->L }
% 58.64/7.77 ifeq(join(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X))))))), join(X, meet(Z, Y))), one, ifeq(zero, zero, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y))), join(X, meet(Z, Y)))
% 58.64/7.77 = { by lemma 35 R->L }
% 58.64/7.77 ifeq(join(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X))))))), join(X, meet(Z, Y))), one, ifeq(meet(join(X, meet(Z, Y)), meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), zero, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y))), join(X, meet(Z, Y)))
% 58.64/7.77 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.77 ifeq(join(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X))))))), join(X, meet(Z, Y))), one, ifeq(meet(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X))))))), join(X, meet(Z, Y))), zero, complement(meet(complement(join(X, meet(meet(Z, Y), complement(X)))), complement(meet(join(X, meet(Z, Y)), complement(join(X, meet(meet(Z, Y), complement(X)))))))), join(X, meet(Z, Y))), join(X, meet(Z, Y)))
% 58.64/7.77 = { by axiom 11 (meet_join_complement) }
% 58.64/7.77 join(X, meet(Z, Y))
% 58.64/7.77 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.77 join(X, meet(Y, Z))
% 58.64/7.77
% 58.64/7.77 Lemma 38: join(X, meet(Y, join(X, Z))) = join(X, meet(Y, Z)).
% 58.64/7.77 Proof:
% 58.64/7.77 join(X, meet(Y, join(X, Z)))
% 58.64/7.77 = { by lemma 32 R->L }
% 58.64/7.77 meet(join(X, Z), join(X, meet(join(X, Z), Y)))
% 58.64/7.77 = { by lemma 37 R->L }
% 58.64/7.77 meet(join(X, Z), join(X, meet(join(X, Z), meet(Y, complement(X)))))
% 58.64/7.77 = { by lemma 32 }
% 58.64/7.77 join(X, meet(meet(Y, complement(X)), join(X, Z)))
% 58.64/7.77 = { by lemma 26 R->L }
% 58.64/7.77 join(X, meet(meet(Y, complement(X)), join(Z, meet(X, meet(Y, complement(X))))))
% 58.64/7.77 = { by lemma 29 }
% 58.64/7.77 join(X, meet(meet(Y, complement(X)), join(Z, zero)))
% 58.64/7.77 = { by axiom 10 (associativity_of_meet) }
% 58.64/7.77 join(X, meet(Y, meet(complement(X), join(Z, zero))))
% 58.64/7.77 = { by lemma 13 }
% 58.64/7.77 join(X, meet(Y, meet(complement(X), Z)))
% 58.64/7.77 = { by axiom 4 (commutativity_of_meet) }
% 58.64/7.77 join(X, meet(Y, meet(Z, complement(X))))
% 58.64/7.77 = { by lemma 37 }
% 58.64/7.77 join(X, meet(Y, Z))
% 58.64/7.77
% 58.64/7.77 Goal 1 (prove_distributivity): meet(a, join(b, c)) = join(meet(a, b), meet(a, c)).
% 58.64/7.77 Proof:
% 58.64/7.77 meet(a, join(b, c))
% 58.64/7.77 = { by lemma 20 R->L }
% 58.64/7.77 meet(meet(a, join(b, c)), join(b, meet(a, join(b, c))))
% 58.64/7.77 = { by lemma 38 }
% 58.64/7.77 meet(meet(a, join(b, c)), join(b, meet(a, c)))
% 58.64/7.77 = { by axiom 10 (associativity_of_meet) }
% 58.64/7.77 meet(a, meet(join(b, c), join(b, meet(a, c))))
% 58.64/7.77 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.77 meet(a, meet(join(c, b), join(b, meet(a, c))))
% 58.64/7.77 = { by axiom 4 (commutativity_of_meet) R->L }
% 58.64/7.77 meet(a, meet(join(b, meet(a, c)), join(c, b)))
% 58.64/7.77 = { by axiom 2 (commutativity_of_join) R->L }
% 58.64/7.77 meet(a, meet(join(b, meet(a, c)), join(b, c)))
% 58.64/7.77 = { by lemma 21 R->L }
% 58.64/7.77 meet(a, meet(join(b, meet(a, c)), join(b, join(c, meet(a, c)))))
% 58.64/7.77 = { by lemma 23 R->L }
% 58.64/7.77 meet(a, meet(join(b, meet(a, c)), join(c, join(b, meet(a, c)))))
% 58.64/7.77 = { by lemma 20 }
% 58.64/7.77 meet(a, join(b, meet(a, c)))
% 58.64/7.77 = { by lemma 22 R->L }
% 58.64/7.77 join(meet(a, c), meet(a, join(b, meet(a, c))))
% 58.64/7.77 = { by axiom 2 (commutativity_of_join) }
% 58.64/7.77 join(meet(a, c), meet(a, join(meet(a, c), b)))
% 58.64/7.77 = { by lemma 38 }
% 58.64/7.77 join(meet(a, c), meet(a, b))
% 58.64/7.77 = { by axiom 2 (commutativity_of_join) }
% 58.64/7.77 join(meet(a, b), meet(a, c))
% 58.64/7.77 % SZS output end Proof
% 58.64/7.77
% 58.64/7.77 RESULT: Unsatisfiable (the axioms are contradictory).
%------------------------------------------------------------------------------