You may call me at (301) 405-5166 or reach me by email at jmr@math.umd.edu. I usually attend the Geometry/Topology Seminar (Mondays 3-4), the Algebra/Number Theory and Representation Theory Seminars (Mondays and Wednesdays 2-3), and the Departmental Colloquium Fridays 3-4. My office hours (Fall 2009) are Wednesdays and Fridays 11-12 in room MTH 2114.