contravariant

contravariant englanniksi

1. Which reverses the order of morphism composition: formally, which associates each morphism f:X \to Y to a morphism F(f):F(Y) \to F(X).

(ant)

2. Using or relating to contravariance.

3. Scaling inversely with a change of basis.

4. A bihomogeneous polynomial in dual variables of ''x'', ''y'', ... and the coefficients of some homogeneous form in ''x'', ''y'', ... that is invariant under some group of linear transformations.