Proof. Suppose that (X, ∗, 0) is a KKM-algebra and x, y ∈ X.
(X, ∗, 0) be a commutative KKM-algebra. Then, from property (P-4) of proposition 2.3 and proposition 3.3, we have
Proof. Suppose that (X, ∗, 0) is a KKM-algebra and x, y ∈ X.(X, ∗, 0) be a commutative KKM-algebra. Then, from property (P-4) of proposition 2.3 and proposition 3.3, we have
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