This package provides tools for working with various Kan extensions and Kan lifts in Haskell.
Among the interesting bits included are:
- Right and left Kan extensions (
- Right and left Kan lifts (
- Multiple forms of the Yoneda lemma (
Codensitymonad, which can be used to improve the asymptotic complexity of code over free monads (
- A "comonad to monad-transformer transformer" that is a special case of a right Kan lift. (
Contributions and bug reports are welcome!
Please feel free to contact me through github or on the #haskell IRC channel on irc.freenode.net.