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and differential equations, which play an important role in differential geometry. He told us that he has been studying the Ricci flow on manifolds in relation to the Poincaré conjecture (I think). When the looks on our faces betrayed our collective total lack of a clue he went on to try to explain. This is when we learned he is quite the garage topologist. In a matter of minutes he single handedly (although using both hands) used a Ziploc sandwich bag to represent S2, S3, and S4. On the bag he performed surgeries, attaching no less than 1 right hand, and 2 tea bags. I tried, at one point during the discussion, to use a tea cup to help illustrate the concept of genus he was explaining by wadding the sandwich bag up into some sort of torus, but it was clear my cliché cup example was no match for his S.C. Johnson genius (yes, I know I am retarded).
After the mathematical discussion ended there were a few awkward pauses as we realized we were all boring math people and hence had nothing else to talk about. Zack, who takes Japanese language and poetry classes, tried to engage Peng in a discussion about Asian literature and cinema, but it seemed they had not read any of the same novels or poetry, nor had they seen any of the same movies, so this failed miserably.
All in all he seemed like a nice guy and those he will be taking 400 analysis next year can look forward to having him as their teacher.
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