A monad is a monoid in the category of endofuctors. What’s the problem dude?
A monad is a monoid in the category of endofuctors. What’s the problem dude?
Last Tuesday, Eric Mertens gave the Galois tech talk Introducing Well-Founded Recursion. I have to admit, most of this went over my head the first time I heard it. Here are some notes that I ended up writing for myself as I stepped through the code again. I suggest reading the slides first to get [...]
Update. The video of the talk can be found here: Galois Tech Talks on Vimeo: Categories are Databases. On Thursday Dr. David Spivak presented Categories are Databases as a Galois tech talk. His slides are here, and are dramatically more accessible than the paper Simplicial databases. Here is a short attempt to introduce this idea [...]
One of the papers I've been slowly rereading since summer began is "Functional Programming with Bananas, Lenses, Envelopes and Barbed Wire", by Erik Meijer, Maarten Fokkinga and Ross Paterson. If you want to know what {cata,ana,hylo,para}morphisms are, this is the paper to read: section 2 gives a highly readable formulation of these morphisms for the [...]