## Changkeun Oh

### Contact Info

**Email**: coh28@wisc.edu

**Office**: 816 Van Vleck Hall

### About me

I am currently a third year Ph.D student in Department of Mathematics at University of Wisconsin-Madison. I am working with Shaoming Guo. My research interests lie in harmonic analysis. Especially, I am interested in restriction estimates, decoupling inequalities, and their applications.

### Papers

Decoupling inequalities for quadratic forms (with S. Guo, R. Zhang, P. Zorin-Kranich). Preprint.

Fourier restriction estimates for surfaces of co-dimension two in R^5 (with S. Guo). Preprint.

A restriction estimate for surfaces with negative Gaussian curvatures (with S. Guo). Preprint.

Decoupling for two quadratic forms in three variables: a complete characterization (with S. Guo, J. Roos, P.-L. Yung, P. Zorin-Kranich). Preprint.

Small cap decoupling inequalities: Bilinear methods. To appear in Rev. Mat. Iberoam.

Remarks on Wolff's inequality for hypersurfaces (with S. Guo). Math. Proc. Camb. Phil. Soc. 168 (2020) 249-259.

Decouplings for three-dimensional surfaces in R^6. Math. Z. 290 (2018) 389-419.

### Teaching

**Fall 2020:**Math 114 - Algebra and Trigonometry**Spring 2020:**Math 114 - Algebra and Trigonometry**Fall 2019:**Math 234 - Calculus - Functions of Several Variables Math 721 - A First Course in Real Analysis**Spring 2019:**Math 221 - Calculus and Analytic Geometry I**Fall 2018**: Math 421 - The Theory of Single Variable Calculus