Hello, Some people on PF are currently self-studying calculus and topology. So we thought we might make a post here so that interested people could join us. We are doing the following books: Book of Proof by Hammack (freely available on http://www.people.vcu.edu/~rhammack/BookOfProof/) Calculus by Spivak Introduction to topological manifolds by Lee The idea is to discuss theory with eachother and to make problems. Communication is currently through facebook, but there are enough chat rooms where we can talk. If anybody is interested, feel free to PM me. Please only react if you're serious about this. If you're thinking of quitting after a week then this might not be for you.