Office hours are Philadelphia time, in McNeil 519 or by phone at +1 (215) 898-1507. I give priority to those physically present.
Known days when I am away, with no office hours, are posted here. Additional cancellations/modifications (if any) are listed immediately below.
Additional cancellations/modifications: No office hours April 16, 18. Apr 23 office hours end at 2:55.