Covariance and contravariance
Topics referred to by the same term / From Wikipedia, the free encyclopedia
Covariance and contravariance may refer to:
- Covariance and contravariance of vectors, in mathematics and theoretical physics
- Covariance and contravariance of functors, in category theory
- Covariance and contravariance (computer science), whether a type system preserves the ordering ≤ of types