Erdös Numbers At Villanova
The famous "Erdös number" is explained at the Erdos Number Project, which has enormous amount of info on this fascinating collaboration graph. About two-thirds of mathematicians have an Erdos number, with median and mode 5, and maximum 13. Almost 90,000 people have EN=5, while about 6500 have EN=2, and only about 1100 have EN > 8.
At Villanova, I have checked some colleagues' Erdos number using the MathSciNet collaboration option in July 2005. This is what the database indicated at that time. Note that these numbers are upper bounds, since there could be shorter collaboration paths through the physics or engineering literature that is not part of the math database. Since every person listed here with Erdos number > 5 is an engineer or physicist, it is quite likely they might have shorter paths through their own literature.
Erdos Number 2: Andy Woldar, Tim Feeman
Erdos Number 3: Al Marrero, Fritz Hartmann, Sohail Chaudhry, Mirela Damian (note Sohail is in the business college!)
Erdos Number 4: Paul Pasles, Alan Gluchoff, Bill Fleischman, Bob Jantzen, Joe Pigeon, Miriam Seliktar, Giorgi Japaridze, Bob Beck, and Bob DeVos (whose son Matt has EN = 2)
Erdos Number 5: Oliver Ludwig, Phil Maurone, James Peyton Jones, Ken Muske (note that we have a chemist, physicist, electrical engineer, and chemical engineer!)
Erdos Number 6: Alain Phares, Alan Whitman
Erdos Number 7: Don Shaw, Frank Wunderlich
Erdos Number 8: Michael Hones