Usually means: Maps objects and morphisms oppositely.
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We found 5 dictionaries that define the word contravariant functor:

General (2 matching dictionaries)
  1. contravariant functor: Wiktionary
  2. Contravariant functor: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)
  1. contravariant functor: Encyclopedia

Science (2 matching dictionaries)
  1. Contravariant Functor: Eric Weisstein's World of Mathematics
  2. contravariant functor: PlanetMath Encyclopedia

Definitions from Wiktionary (contravariant functor)

noun:  (category theory) A functor which maps a morphism f:X → Y to a morphism F(f):F(Y) → F(X), such that if h=g∘f, then F(h)=F(f)∘F(g).

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