I am a sixth year mathematics graduate student at Columbia University. I have the pleasure and privilege to converse regularly with Aise Johan de Jong. Geometry fascinates me, with algebraic methods my preferred means of exploration. In particular, I think a lot about rational curves, rationality problems, and geometry in positive characteristic. Here is a CV.

### Current Projects

During the Spring of 2022, I am:

• writing about the geometry of $q$-bic hypersurfaces. If you are interested, take a look at a talk I gave on this during the summer!
• I spoke about $q$-bic hypersurfaces in the Moduli Across the Pandemic online seminar on January 29; you can see the video here!
• leading an Undergraduate Seminar on Tilings.

### Contact

email:
rcheng@math.columbia.edu
address:

Department of Mathematics
Columbia University
2990 Broadway
New York, NY 10027