I am a fifth year PhD student in the UCSD mathematics department, studying graph theory. I did my undergraduate and MSc work at Trinity College Dublin (Ireland), which is a really great place to spend five years. At UCSD, I am advised by Fan Chung and Jacques Verstraete. I am also a member of the High Performance Geocomputing group at the San Diego Supercomputer Center.
You can find me in AP&M 5768 or SDSC 307. If you are looking for me, the easiest way to guarantee availability is to send me an email at rjtobin AT ucsd.edu.