Amateur mathematician, professional software engineer. Interested in all kinds of math, becoming a better mathematician, and helping others do the same.
email: jdb1729 (at) gmail.com
150 Why can you turn clothing right-side-out? Aug 19 '10
121 What is the importance of the Collatz conjecture? Aug 18 '10
28 Uses of “Collatz induction”? Aug 9 '15