Mathematics and Computation | Hask is not a category
Hask is not a category 06 August 2016 Andrej Bauer Computation, Programming This post is going to draw an angry Haskell mob, but I just have to say it out loud: I have never seen a definition of the so-called category Hask and I do not actually believe there is one until someone does some serious work. Let us look at the matter a bit closer. The Haskell wiki page on Hask says: The objects of Hask
Hask - HaskellWiki
Hask is the category of Haskell types and functions. Informally, the objects of Hask are Haskell types, and the morphisms from objects A to B are Haskell functions of type A -> B. The identity morphism for object A is id :: A -> A, and the composition of morphisms f and g is f . g = \x -> f (g x). However, subtleties arise from questions such as the following. When are two morphisms equal? People
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https://www.kurims.kyoto-u.ac.jp/~kenkyubu/kokai-koza/H28-hasegawa.pdf
Where do values fit in Category of Hask?
Re: [Haskell-cafe] Basic question concerning the category Hask (was: concerning data constructors)
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