contravariant functor


Also found in: Dictionary.
Related to contravariant functor: Bifunctor

contravariant functor

[¦kän·trə′ver·ē·ənt ′fəŋk·tər]
(mathematics)
A functor which reverses the sense of morphisms.
References in periodicals archive ?
Hence, ' is a contravariant functor that is obviously period two.
i) If B is an abelian group, then [sub.2][H.sup.n] (*; B) is a contravariant functor from the category of algebraic 2-types to the category of abelian groups.
A module J [member of] A-Banmod such that the contravariant functor [sub.A]h(*,J)A-Banmod [right arrow] VS sends short admissible sequences of Banach left A-modules to exact sequences of vector spaces is called injective [12, III.1.14].