Current courses at Tsinghua University

Past courses at Tsinghua University (since 2021)

Past courses at University of Minnesota (2017-2020)

Above: A picture of me cutting along a Möbius strip in my algebraic topology class to demonstrate that a non-orientable manifold admits a connected orientable double cover. This photo was taken by Kayla Wright.

Past courses at University of Chicago (2013-2017)

Undergraduate teaching at Cornell University (2009-2011)


Teaching award