libghc-kan-extensions-doc 5.1-1 (amd64 binary) in ubuntu cosmic

 Kan extensions, Kan lifts, various forms of the Yoneda lemma, and
 (co)density (co)monads.
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.