noun
contravariant
Technical term in mathematics, specifically in tensor analysis and category theory, referring to a property that transforms in a particular way under a change of coordinates or functors.
反変ベクトルは、基底の変換に対して座標が逆に変換される。
A contravariant vector has its coordinates transformed inversely with respect to the change of basis.
この写像は反変関手である
This mapping is a contravariant functor.