Erdős–Bacon Number
en.wikipedia.org
en.wikipedia.org
Source: this book http://www.amazon.co.uk/pracht-van-priemgetallen-eeuwenlange... (not an affiliate link)
Edit: I didn't notice ColinWright's comment :)
It's all a bit silly ...
[0] http://www.ams.org/mathscinet/collaborationDistance.html
Me->Mukkai S. Krishnamoorthy->Joseph E. Flaherty->David C. Arney->Paul Erdős
For a time, it appeared to be 2, but Paul Erdős and the Erdős-1 mathematician with whom I collaborated ultimately withdrew their paper, because they found their results were similar to a previously published paper.I've also appeared on a local Philadelphia PA TV show with newscasters who interviewed Kevin Bacon. Not sure if this gives me a finite Bacon Number, since it was TV (not a movie) and it was non-fiction. If so, then I have the finite Erdős–Bacon Number of 6.
EDIT: it seems my computational geometry professor, Bernard Chazelle, has an E-B number of 5. Too bad I do not have any papers authored with him.