The TA, Ruizhi Zhu, holds office hours on Mondays from 3:10pm to 4pm in GE40 during the teaching term.
I hold office hours every Friday from 3:10pm to 4pm during the last six weeks of the semester. I'm also happy to meet at other times; send me an email message to arrange a time.
Office hours on Thursday December 13: Ruizhi Zhu, 2pm-3pm in GE40. Martin J. Osborne, 3pm-4pm in GE244.