Copyright | (C) 2011-2015 Edward Kmett |
---|---|
License | BSD-style (see the file LICENSE) |
Maintainer | Edward Kmett <ekmett@gmail.com> |
Stability | provisional |
Portability | polykinds |
Safe Haskell | Trustworthy |
Language | Haskell2010 |
Synopsis
- class Semigroupoid k => Groupoid k where
- inv :: k a b -> k b a
Documentation
class Semigroupoid k => Groupoid k where Source #
semigroupoid with inverses. This technically should be a category with inverses, except we need to use Ob to define the valid objects for the category