Module Heyting_Algebra.V
module O : sig ... endval (<|=) : Bool.Heyting_Algebra.t -> Bool.Heyting_Algebra.t -> boolval pseudocomplement : Bool.Heyting_Algebra.t -> boolval relative_pseudocomplement : Bool.Heyting_Algebra.t -> Bool.Heyting_Algebra.t -> Bool.Heyting_Algebra.t -> bool