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 Erdös 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' Erdös number using the MathSciNet collaboration option in July 2005, with some updates in 2008 and 2009. This is what the database indicated at the times I looked. 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. For persons listed here with Erdös number > 5 , it is quite likely they might have shorter paths through their own literature.
Erdös Number 2: Andy Woldar, Tim Feeman, Mike Tait, Melissa Fuentes
Erdös Number 3: Al Marrero, Fritz Hartmann, Sohail Chaudhry (VSB), Mirela Damian, Mary Angela Papalaskari, Marc Meketon , Alexander Diaz-Lopez, Katie Haymaker, Vikram Kamat, Mirela Damian, Paul Pasles, and me.
Erdös Number 4: Elise Pasles, Alan Gluchoff, Bill Fleischman, Bob Jantzen, Joe Pigeon, Miriam Seliktar, Giorgi Japaridze, Bob Beck, Bob DeVos, (whose son Matt has EN = 2) Vijay Gehlot, Bill Fleischman, Jesse Frey, Doug Norton, ( via an article with lead author Papalaskari, coauthors Metzger, Phares, Titone, Way, Weinstein, Wunderlich though MathSciNet has higher figures for some of these coauthors) , Oliver Ludwig (via a student of JCP Miller), Peter Muller, Jiangtou Gou, Sergey Nersesov, Nathan Corwin, Anany Levitin, Daniel Fragiadakis (VSB), Paul Hanouna (VSB), Yimin Zhang (elec engineering), Alicia Strandberg (VSB), Victor Li (VSB), Roy Cook (philosophy),
Erdös Number 5: Phil Maurone, James Peyton Jones, Moeness Amin, Ken Muske, Bo Wang, Nat Nataraj, Alan Whitman, Al Ortega, Hashem Ashrafioun, Verica Radisavljevic-Gajic, Ken Muske, Pankaj Patel (VSB) Klaus Volpert, Paul Bernhardt, Yimin Zhang (stats),
Erdös Number 6: Daniel Wright (VSB), Scott Dressler (VSB), Qianhong Wu (mech engineering), Amanda Knecht,
Erdös Number 7: Don Shaw, Kaitlyn Muller, Ahmad Hoorfar
Erdös Number 8: Michael Hones