What exactly is the relation between Haskell and category theory?
Haskell and category theory are two of the most important languages in computer science. They both allow for powerful abstractions that make it easier to reason about computational problems. Haskell is known for its type system, which makes it a perfect language for logic programming and functional programming. Category theory provides a way of representing mathematical structures using terms from set theory, where every object can be represented by a set containing all of its instances.
Together, these languages form what is called the Haskell-category Theory Framework (HCF). The HCF allows mathematicians and hackers to work together more easily by connecting concepts that would otherwise be difficult or impossible to combine. As such, understanding how Haskell and category theory interact should not only help you with your own computing tasks but also deepen your knowledge of mathematics as a whole!