If you would like to easily draw Message Sequence Charts (or security protocol diagrams) in LaTeX, you may want to use the MSC LaTeX macro package.
Trying to merge two of my hobbies, I wrote a paper on juggling.
My Erdös number is 3 (P. Erdös; R. Tijdeman; M. Voorhoeve; S. Mauw). Thus, if you are one of my co-authors, your Erdös number is at most 4. If you are related to the Eindhoven University of Technology, see the list.