Erdös number of Joris Van der Jeugt

Most mathematicians are familiar with the definition of one's Erdös number. Paul Erdös, the Hungarian mathematician of the highest caliber, wrote hundreds of papers in many different areas, many in collaboration with others. His Erdös number is 0. His co-authors have Erdös number 1. People other than Erdös who have written a joint paper with someone with Erdös number 1 but not with Erdös himself have Erdös number 2, and so on. See the collaboration graph of some famous mathematicians.

The Erdös Number Project Web site gives much information about all this.

(1997) I think that my own Erdös number is currently 4; in fact there are many paths of length 4 in my collaboration graph. One such path is:

Joris VAN DER JEUGT 
   Jiri PATERA
      Hans J. ZASSSENHAUS
         Ronald L. GRAHAM
            Paul ERDOS

(2006) Somebody told me that my Erdös number is now 3, due to the path:

Joris VAN DER JEUGT
   Veerle FACK
      Brendan D. MCKAY
         Paul ERDOS

Joris Van der Jeugt March 2006