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 2-3), and the Departmental Colloquium (Wednesdays or Fridays 3-4). My office hours (Spring 2012) are Mondays and Wednesdays 10:00-10:45 in room MTH 2114, or by appointment.