Preface_specs.DivisibleDivisible is a "Contravariant Applicative Functor", in other word, Divisible is the dual of an Applicative
module type WITH_DIVIDE_AND_CONQUER = sig ... endExposes the divide and conquer functions, mandatory for each requirement.
module type WITH_CONTRAMAP_AND_DIVIDE_AND_CONQUER = sig ... endmodule type CORE = WITH_CONTRAMAP_AND_DIVIDE_AND_CONQUERBasis operations.
module type OPERATION = sig ... endAdditional operations.
module type INFIX = sig ... endInfix operators.
module type API = sig ... endThe complete interface of a Divisible.