Size Functor: Manifold, Continuous Function, Abelian Groups, Functor

Inverse Image Functor: Mathematics, Contravariant, Direct Functor

Injective Sheaf: Mathematics, Abelian Group, Sheaf Cohomology, Derived Functor

Predicate Functor Logic

Torsion Subgroup: Abelian Group, Subgroup, Identity Element, Order (Group Theory), Covariant Functor