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New posts in category-theory

It's not a monad, but what is it?

Composition of two functors is a functor

Generalization of strong and closed profunctors

How to define equality for Category instances?

haskell category-theory

Every monad is monoid?

haskell category-theory

Why isn't there a simple syntax for coproduct types in Haskell?

What would be the methods of a bi-comonad?

Defining Categories and Category Laws in Haskell

Does each type have a unique catamorphism?

Why must fmap map every element of a List?

What's the relation of fold on Option, Either etc and fold on Traversable?

Functor instance for generic polymorphic ADTs in Haskell?

What is the relationship between bind and join?

What's the history behind the Functor type class?

Does * in (<*>) have a special meaning?

What is a purpose of Zap Functor and zap function in Haskell?

Is this an accurate example of a Haskell Pullback?

haskell category-theory

How is "a monoid on applicative functors" different than "a monoid in the category of endofunctors"?