Bob Carpenter's Erdös Number

My Erdös number is less than or equal to 4. The Erdös number is determined by stringing together collaborators on published papers.

• 0. Paul Erdös
• 1. Kenneth Kunen
• 2. K. Jon Barwise
• 3. Rich Thomason
• 4. Bob Carpenter

That is, Paul Erdös wrote a paper with Kenneth Kunen, who wrote a paper with Jon Barwise, who wrote a paper with Rich Thomason, with whom I wrote a paper.

Thanks to Chris Volinsky's DBLP Social Network Application, which helped me shave two links off the upper bound.

Check out the Erdös Number Project Home Page, or read Erdös's biography, The Man Who Loved Only Numbers.