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

[ bsd3, comonads, data-structures, functors, library, monads ] [ Propose Tags ]

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


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Versions 0.1, 0.1.1, 0.1.2, 0.2, 0.2.1, 0.2.2, 0.5.0, 0.5.1, 1.8.0, 1.9.0, 2.0.0, 2.0.0.1, 2.0.0.2, 2.0.0.3, 2.0.1, 2.0.2, 2.1, 2.1.2, 2.2, 2.3, 2.4, 2.4.0.1, 2.5, 2.6, 2.7, 3.0, 3.1, 3.1.0.1, 3.1.0.2, 3.1.1, 3.1.2, 3.4, 3.5, 3.5.1, 3.6, 3.6.2, 3.7, 4.0, 4.0.1, 4.0.2, 4.0.3, 4.1, 4.1.0.1, 4.1.1, 4.2, 4.2.1, 4.2.2, 4.2.3, 5, 5.0.1, 5.0.2, 5.1
Change log CHANGELOG.markdown
Dependencies adjunctions (>=4.2 && <5), array (>=0.3.0.2 && <0.6), base (>=4.7 && <5), comonad (==4.*), containers (>=0.4 && <0.6), contravariant (==1.*), distributive (>=0.2.2 && <1), free (==4.*), mtl (>=2.0.1 && <2.3), pointed (==4.*), semigroupoids (==4.*), transformers (>=0.2 && <0.5) [details]
License BSD-3-Clause
Copyright Copyright (C) 2008-2013 Edward A. Kmett
Author Edward A. Kmett
Maintainer Edward A. Kmett <ekmett@gmail.com>
Revised Revision 1 made by HerbertValerioRiedel at Thu Jan 8 08:22:41 UTC 2015
Category Data Structures, Monads, Comonads, Functors
Home page http://github.com/ekmett/kan-extensions/
Bug tracker http://github.com/ekmett/kan-extensions/issues
Source repo head: git clone git://github.com/ekmett/kan-extensions.git
Uploaded by EdwardKmett at Mon Jul 28 07:51:05 UTC 2014
Distributions Arch:5.1, Debian:4.2.3, Fedora:5.0.2, FreeBSD:4.2.2, LTSHaskell:5.1, NixOS:5.1, Stackage:5.1, openSUSE:5.1
Downloads 73896 total (179 in the last 30 days)
Rating 2.25 (votes: 2) [estimated by rule of succession]
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Status Docs uploaded by user [build log]
All reported builds failed [all 1 reports]
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Readme for kan-extensions-4.1

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kan-extensions

Build Status

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