If, on the other hand, you're in a social mood, you could always propose a round of the Bacon-Erds game. In a variation of "Six Degrees of Kevin Bacon," which tests the knowledge of movie buffs by asking them to connect any actor to the ubiquitous Bacon through six or less films, mathematicians rank themselves by how close they've come to working with Paul Erds, the prolific Hungarian genius who died in 1996. An Erds number of 2, for example, means that you've co-authored a paper with someone who has published with Erds. Now, thanks to the appearance of real mathematicians in movies like A Beautiful Mind, a lucky few can claim a Bacon-Erds number, which measures the total number of steps that separate a mathematician from both Erds and Bacon. Columbia University physicist Brian Greene has an Erds number of 3, and because he appears in Frequency with John DiBenedetto, who had a minor role opposite Bacon in Sleepers, Greene's Bacon-Erds score comes to 5. As you can see, this is just the sort of thing
to really liven up a party.