I am a fifth 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.

### Current Projects

During the Spring of 2021, I am:

• thinking about $q$-bic surfaces in positive characteristic!

Recently, I also thought about negative curves in rational surfaces in positive characteristic with Remy van Dobben de Bruyn; check it out here!

### Contact

email:
rcheng@math.columbia.edu