Notes on expander graphs now on GitHub

Several years ago I wrote a set of introductory notes (pdf) about expander graphs, an exceptionally useful concept from computer science. I’m not an expert on expanders, but the notes were more popular than I anticipated, and still get a surprising amount of traffic. As an experiment, I’ve put the LaTeX source for the notes up on GitHub, under a Creative Commons Attribution license. That makes it trivial for anyone interested to fork, remix and adapt the notes. I don’t imagine a sudden outbreak of expander graph remixes, but maybe they’ll be useful to someone.