“…Let I be a proper ideal of a residuated lattice A. I is said to be a prime ideal, if, for all I 1 , I 2 ∈ I(A), if I 1 ∩ I 2 ⊆ I, then I 1 ⊆ I and I 2 ⊆ I. Proposition 1 (see [10,20]). Let P be a subset of residuated lattice A. P is a prime ideal if and only if, for all a, b ∈ A, if a ″ ∧ b ″ ∈ P, then a ∈ P or b ∈ P.…”