Starting at value 2 the Erdős number is no longer a distinction, but an honor that comes to one by one or several lucky coincidences in 4D space-time. Due to such luck my Erdős number is at most 4 (obtained from MathSciNet collaboration distance calculator on 30/6/2011).
Two co-authorship chains connecting me to Paul Erdős are:
| H.-C. Hege | coauthored with | Peter Deuflhard | ≥ 27 joint publications |
| Peter Deuflhard | coauthored with | Dietrich Braess | MR1954560 (2004a:65169) |
| Dietrich Braess | coauthored with | Allan M. Pinkus | MR1216487 (94d:41003) |
| Allan M. Pinkus | coauthored with | Paul Erdős | MR0775969 (86m:41005) |
or
| H.-C. Hege | coauthored with | Hans-Peter Seidel | ≥ 19 joint publications |
| Hans-Peter Seidel | coauthored with | Oleg V. Davydov | MR2369510 |
| Oleg V. Davydov | coauthored with | Allan M. Pinkus | MR1451512 (98k:41042) |
| Allan M. Pinkus | coauthored with | Paul Erdős | MR0775969 (86m:41005) |
Counting the semi-scientific publication [1], my Erdős number is even 3:
| H.-C. Hege | coauthored with | Günter M. Ziegler | [1] |
| Günter M. Ziegler | coauthored with | László Pyber | MR1373697 (97f:00003) |
| László Pyber | coauthored with | Paul Erdős | MR1221596 |
[1] Günter M. Ziegler, Hans-Christian Hege and Georg Duda. Neue Bilder für die Medizin? – Notizen aus der Matheon-Lounge. Mitteilungen der DMV, 13:3:163–167, 2005.