Alexander Bogomolny, a software developer and former mathematics professor, operates this educational and interesting Web site. His intention in creating the site is to help people "learn, if not math itself, then, at least, ways to appreciate its beauty." Although beauty is something most of us generally do not associate with the subject, the material manages to spark creative thinking by providing a fun, original way of looking at math. There are Java games and puzzles representing many different topics. A monthly interactive column called Cut The Knot! describes various abstract mathematical problems and concepts. Some of the topics discussed on the site are quite advanced, but others are relatively simple.