functor

• The new scheme is doubly generic: in addition to being parametric in a functor capturing the signature of an inductive type, it is also parametric in a comonad and a distributive law (of the functor over the comonad) that together encode the recursive call pattern of a particular recursion scheme for this inductive type. —  CiteULike: Everyone's library
• Monads in haskell aren't automatically Functors, although by rights they should be, and given a Monad you should get a valid functor instance using fmap = liftM. —  Random Hacks
• Application of this functor provides cochain complex. —  The Code Project Latest Articles
• * It must be equipped with a functor over the category which maps any pair of objects to another object, and any pair of arrows to another arrow. —  Planet Haskell
• (This type of functor is similar to a normal functor apart from operating on pairs - and is known as a Bifunctor). —  Planet Haskell

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