# nLab dual equivalence

A dual equivalence, or antiequivalance, between categories (or higher categories) $C$ and $D$ is simply an equivalence between one and the opposite category of the other. It is usually most convenient to think of the equivalence as going from $C^{op}$ to $D$, as with a contravariant functor in general.

Many examples of abstract duality involve dual equivalences.

Created on November 19, 2009 22:26:12 by Toby Bartels (173.60.119.197)