“…Inspired by this, monadic Heyting algebras, an algebraic model of the one-variable fragment of the intuitionistic predicate logic, were introduced and developed in [1,14,15]. Subsequently, monadic MV-algebras, an algebraic model of the one element fragment of Lukasiewicz predicate logic, were introduced and studied in [7,18,19]. After then, monadic BL-algebras, monadic residuated lattices, monadic basic algebras and monadic residuated ℓ-monoids were introduced and investigated in [10,20,6,21].…”