Hi all. When I was playing with Haskell and reading stuff about it, I noticed that there is a lot of information in a form of research papers and a lot of mathematics involved. I must confess that I quite like this academic approach. Well, I thought that while I am still at university I could take some math classes to help me better understand these things and broaden my horizon. Any suggestion what could be relevant? I came up with: * Lambda calculus - the basis of functional languages * Category theory - where all these mysterious things like monads, arrows, and functors come from. * Topology (?) - don't know; I thought it is important rather in mathematical analysis (which I don't like much) but I have seen somewhere some references to it in context of CS. Any other suggestions? Thanks, Tom.