Does anybody know what Barack Obama's Erdos number is? (In particular, is it even defined?)
I learned a few days ago that if the links are people who know each other, my distance from Barack Obama is at most four -- Joe Biden went to high school with the father of a friend of mine. (Yes, this only proves that I'm at distance at most three from Biden; proving that I'm at distance at most four from Obama is left as an exercise for the reader.
Then again, I'm not sure if Obama even has academic publications, or where I'd look to find out if he did. The relevant Wikipedia article says "he published no legal scholarship", citing this New York Times article, though.