Four degrees of separation

While preparing my materials to apply for academic positions I figured out that I have an Erdős number.  An Erdős number is much like a Bacon number, the number of movie links from an actor to Kevin Bacon.  For example, Stephen Merchant was in Hot Fuzz with Lucy Punch, who was in Being Julia with Maury Chaykin, who was in Where the Truth Lies with Kevin Bacon, and there's no shorter chain, so Stephen Merchant's Bacon number is 3.

Paul Erdős was a famous mathematician and a prolific publisher of academic papers.  He wrote a paper with Douglas B. West, who wrote a paper with Clyde P. Kruskal, who wrote a paper with Ron K. Cytron, who wrote a paper with me.  So my Erdős number is 4.

Danica McKellar has an Erdős number of 4 and a Bacon number of 2.  I still have no Bacon number.  I'll have to work on that.