@hackage kan-extensions5

Kan extensions, Kan lifts, various forms of the Yoneda lemma, and (co)density (co)monads

Categories
- Data Structures
- Monads
License
BSD-3-Clause
Maintainer
Edward A. Kmett <ekmett@gmail.com>
Links
Versions
- 5.2.6 Sat, 4 May 2024
- 5.2.5 Sat, 30 Sep 2023
- 5.2.4 Sat, 7 May 2022
- 5.2.3 Tue, 27 Jul 2021
- 5.2.2 Mon, 26 Jul 2021
- 5.2.1 Thu, 1 Oct 2020

Installation
In your cabal file:
Dependencies (12)
- array >=0.3.0.2 && <0.6
- base >=4.4 && <5
- containers >=0.4 && <0.6
- mtl >=2.0.1 && <2.3
- transformers >=0.2 && <0.6
- adjunctions >=4.2 && <5
Dependents (47)
@hackage/box, @hackage/free-operational, @hackage/servant-http-streams, @hackage/objective, @hackage/config-schema, @hackage/neural, Show all…

kan-extensions

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 (Ran and Lan)
Right and left Kan lifts (Rift and Lift)
Multiple forms of the Yoneda lemma (Yoneda)
The Codensity monad, which can be used to improve the asymptotic complexity of code over free monads (Codensity, Density)
A "comonad to monad-transformer transformer" that is a special case of a right Kan lift. (CoT, Co)

Contact Information

Contributions and bug reports are welcome!

Please feel free to contact me through github or on the #haskell IRC channel on irc.freenode.net.

-Edward Kmett