UCLA Mathematics Department

Box 951555

Los Angeles, CA 90095-1555, U.S.A.

Office: MS 6224

Email:*MyFirstName at math.ucla.edu*

Box 951555

Los Angeles, CA 90095-1555, U.S.A.

Office: MS 6224

Email:

I am a Hedrick Assistant Adjunct Professor at Department of Mathematics, UCLA, under the mentorship of Prof. Inwon Kim.

- Ph.D. in Mathematics, New York University, 2013 - 2018.

Advisor: Prof. Fang-Hua Lin

Thesis: On the Stokes Immersed Boundary Problem in Two Dimensions

- B.S. in Applied and Computational Mathematics, Peking University, 2009 - 2013.

**Research Interests:** PDEs and applied mathematics, especially evolution free boundary problems, fluid-structure interaction, liquid crystals, and complex and active fluids.

- Regularity of Minimizers of a Tensor-valued Variational Obstacle Problem in Three Dimensions

Zhiyuan Geng and Jiajun Tong,*arXiv:1908.10889. Accepted by Calc. Var. Partial Differential Equations.* - Regularized Stokes Immersed Boundary Problems in Two Dimensions: Well-posedness, Singular Limit, and Error Estimates

Jiajun Tong,*arXiv:1904.09528. Accepted by Comm. Pure Appl. Math..* - Directed Migration of Microscale Swimmers by an Array of Shaped Obstacles: Modeling and Shape Optimization

Jiajun Tong and Michael J. Shelley,*SIAM J. Appl. Math. (2018), 78(5), 2370-2392.* - On the Viscous Camassa-Holm Equations with Fractional Diffusion

Zaihui Gan, Fang-Hua Lin and Jiajun Tong,*arXiv:1709.00774. To appear in Discrete Contin. Dyn. Syst..* - Solvability of the Stokes Immersed Boundary Problem in Two Dimensions

Fang-Hua Lin and Jiajun Tong,*Comm. Pure Appl. Math. (2019), 72(1), pp. 159-226.* - Guiding microscale swimmers using teardrop-shaped posts

Megan S. Davies Wykes, Xiao Zhong, Jiajun Tong, Takuji Adachi, Yanpeng Liu, Leif Ristroph, Michael D. Ward, Michael J. Shelley and Jun Zhang,*Soft Matter (2017), 13, pp. 4681-4688.* - Stability of Soft Quasicrystals in a Coupled-Mode Swift-Hohenberg Model
for Three-Component Systems

Kai Jiang, Jiajun Tong and Pingwen Zhang,*Commun. Comput. Phys. (2016), 19, pp. 559-581.* - Stability of two-dimensional soft quasicrystals in systems with two length scales

Kai Jiang, Jiajun Tong, Pingwen Zhang and An-Chang Shi,*Phys. Rev. E (2015), 92(4), 042159.*

**Winter 2020:** I am teaching MATH 151A Applied Numerical Methods Sections 1 & 2.

- Office hours: 1) M 3pm-4:30pm, W 1pm-2:30pm, Th 10am-11:30am; or 2) by email appointment.
- Matlab and other computing resources are accessible at PIC lab and at UCLA Library in CLICC or via remote access.
- Find quick tutorials on Matlab here (by Prof. Chris Anderson at UCLA) or here (by Prof. Andrew E. Yagle).

MATH 151A/1 (CCLE logon required): MWF 8am / MS 6229.

- Course TA: Mingtao Xia / MS 2943.
- Discussion section: Th 8am / MS 6229.
- TA office hours: Th 11:50am-1:50pm.

MATH 151A/2 (CCLE logon required): MWF 10am / MS 6229.

- Course TA: Yurun Ge / MS 3903.
- Discussion section: Tu 10am / MS 6229.
- TA office hours: 2:30pm-4pm.

**Spring 2020:** I will teach MATH 136 Partial Differential Equations.

For enrollment questions, you are advised to first consult with the math department undergraduate office (MS 6356 / ugrad at math.ucla.edu). The math department does not use PTE numbers for this course.

Find my past teaching here.Updated in Jan. 2020.