Current Publications

81. (with Z. Liu, Y. Yu) Sharp global and almost everywhere convergence rates for periodic homogenization of viscous quadratic Hamilton-Jacobi equations, arXiv.
82. (with G. Shiu, F. Tonioni) Bounding axion dark energy, arXiv.
83. (with X. Guo, W. Jing, Y. P. Zhang) Quantification of ergodicity for Hamilton--Jacobi equations in a dynamic random environment arXiv.
84. (with X. Guo, T. Sprekeler) Homogenization of non-divergence form operators in i.i.d. random environments arXiv.
85. (with T. Jin, Y.Y. Li, X. Tu) A Liouville theorem for convex functions with periodic Monge-Ampère measure arXiv.
86. (with H. Mitake, P. Ni) Quantitative homogenization of convex Hamilton-Jacobi equations with u/ε-periodic Hamiltonians, arXiv.
87. (with G. Shiu, F. Tonioni) Long-lived SEC violation via DM/DE couplings, Journal of High Energy Physics (JHEP) arXiv.
88. Representation formulas and large time behavior for solutions to some nonconvex Hamilton--Jacobi equations arXiv.
89. (with X. Guo, Y. P. Zhang) Policy iteration for nonconvex viscous Hamilton--Jacobi equations, SIAM Journal on Applied Mathematics arXiv.
90. (with S. Strikwerda, M.-B. Tran) Controlling Klein-Gordon Chains and Lattices arXiv.
91. (with J. Jang) Discrete Coagulation-Fragmentation equations with multiplicative coagulation kernel and constant fragmentation kernel, Advances in Continuous and Discrete Models: Theory and Applications Open access, Editor's Picks. ACDM Best Paper Award 2025.
92. (with G. Shiu, F. Tonioni) Analytic bounds on late-time axion-scalar cosmologies, Journal of High Energy Physics (JHEP) arXiv.
93. (with Z. Wang, Y. P. Zhang) Policy Iteration for exploratory Hamilton--Jacobi--Bellman equations, Applied Mathematics and Optimization arXiv.
94. (with Y. Han, W. Jing, H. Mitake) Quantitative homogenization of state-constraint Hamilton--Jacobi equations on perforated domains and applications, Arch. Ration. Mech. Anal. arXiv. (A periodic perforated domain of this paper is featured above).
95. (with J. Qian, T. Sprekeler, Y. Yu) Optimal rate of convergence in periodic homogenization of viscous Hamilton-Jacobi equations, Multiscale Modeling and Simulation (MMS) arXiv.
96. (with H. Mitake, Y. Oka) Quenching for axisymmetric hypersurfaces under forced mean curvature flows, Nonlinearity arXiv.
97. (with H. Mitake) Asymptotic growth rate of solutions to level-set forced mean curvature flows with evolving spirals, Bull. London Math. Soc. Open access, arXiv.
98. (with G. Shiu, F. Tonioni) Collapsing universe before time, Journal of Cosmology and Astroparticle Physics (JCAP) arXiv.
99. (with H. Dong, Tuoc Phan) Nondivergence form degenerate linear parabolic equations on the upper half space, Journal of Functional Analysis arXiv.
100. (with G. Shiu, F. Tonioni) Late-time attractors and cosmic acceleration, Physical Review D arXiv.
101. (with H. Mitake, C. Mooney, J. Xin, Y. Yu) Bifurcation of homogenization and nonhomogenization of the curvature G-equation with shear flows, Mathematische Annalen arXiv.
102. (with G. Shiu, F. Tonioni) Accelerating universe at the end of time, Physical Review D arXiv.
103. (with X. Guo) Optimal convergence rates in stochastic homogenization in a balanced random environment, Probability Theory and Related Fields arXiv.
104. (with W. Tang, Y. P. Zhang) Policy iteration for the deterministic control problems — a viscosity approach, SIAM Journal on Control and Optimization arXiv.
105. (with X. Guo) Stochastic integrability of heat-kernel bounds for random walks in a balanced random environment, Electronic Journal of Probability arXiv.
106. (with Y. Yu) Differentiability of effective fronts in the continuous setting in two dimensions, International Mathematics Research Notices arXiv.
107. (with T.-S. Van) Local mass-conserving solution for a critical Coagulation-Fragmentation equation, J. Differential Equations arXiv.
108. (with X. Guo, T. Sprekeler) Characterizations of diffusion matrices in homogenization of elliptic equations in nondivergence-form, Calculus of Variations and PDE arXiv.
109. (with W. Jing, Y. Yu) Effective fronts of polygon shapes in two dimensions, SIAM Journal on Mathematical Analysis arXiv.
110. (with Y. Yu) Optimal convergence rate for periodic homogenization of convex Hamilton-Jacobi equations, Indiana University Math Journal arXiv.
111. (with Thuy T. Le, Loc. H. Nguyen) A Carleman-based numerical method for quasilinear elliptic equations with over-determined boundary data and applications, Computers and Mathematics with Applications arXiv.
112. (with J. Jang, D. Kwon, H. Mitake) Level-set forced mean curvature flow with the Neumann boundary condition, J. Math. Pures Appl. arXiv.
113. (with H. Dong, Tuoc Phan) Degenerate linear parabolic equations in divergence form on the upper half space, Trans. Amer. Math. Soc. arXiv.
114. (with Tuoc Phan) On a class of divergence form linear parabolic equations with degenerate coefficients (unpublished, superseded by Paper 49) arXiv.
115. (with M. Klibanov, Loc H. Nguyen) Numerical viscosity solutions to Hamilton-Jacobi equations via a Carleman estimate and the convexification method, Journal of Computational Physics arXiv.
116. (with T. Sprekeler) Optimal convergence rates for elliptic homogenization problems in nondivergence-form: analysis and numerical illustrations, Multiscale Modeling and Simulation (MMS) arXiv.
117. Selection problems in Large Deviations in Games under the logit choice protocol, Minimax Theory and its Applications pdf.
118. (with D. Gomes, H. Mitake) The large time profile for Hamilton--Jacobi--Bellman equations, Mathematische Annalen arXiv.
119. (with H. Mitake, T.-S. Van) Large time behavior for a Hamilton-Jacobi equation in a critical Coagulation-Fragmentation model, Comm Math Sci. arXiv.
120. (with X. Guo, Y. Yu) Remarks on optimal rates of convergence in periodic homogenization of linear elliptic equations in non-divergence form, Partial Differential Equations and Applications arXiv.
121. (with T.-S. Van) Coagulation-Fragmentation equations with multiplicative coagulation kernel and constant fragmentation kernel, Comm. Pure Appl. Math arXiv.
122. (with W. Jing, Y. Yu) Effective fronts of polytope shapes, Minimax Theory and its Applications pdf.
123. (with Y. Kim, Son N. T. Tu) State-constraint static Hamilton-Jacobi equations in nested domains, SIAM Journal on Mathematical Analysis arXiv.
124. (with Y. Giga, H. Mitake) Remarks on large time behavior of level-set mean curvature flow equations with driving and source terms, DCDS-B arXiv.
125. (with X. Guo, J. Peterson) Quantitative homogenization in a balanced random environment, Electronic Journal of Probability arXiv.
126. (with W. Jing, H. Mitake) Generalized ergodic problems: existence and uniqueness structures of solutions, J. Differential Equations arXiv.
127. (with Y. Giga, L. Zhang) On obstacle problem for mean curvature flow with driving force, Geometric Flows pdf.
128. (with Y. Giga, H. Mitake, T. Ohtsuka) Existence of asymptotic speed of solutions to birth and spread type nonlinear partial differential equations, Indiana University Math Journal arXiv.
129. (with W. H. Sandholm, S. Arigapudi) Hamilton-Jacobi Equations with Semilinear Costs and State Constraints, with Applications to Large Deviations in Games, Mathematics of Operations Research pdf.
130. (with H. Mitake) On uniqueness sets of additive eigenvalue problems and applications, Proc. Amer. Math. Soc. arXiv.
131. (with H. Mitake, Y. Yu) Rate of convergence in periodic homogenization of Hamilton-Jacobi equations: the convex setting, Arch. Ration. Mech. Anal. arXiv.
132. (with Y. Yu) A rigidity result for effective Hamiltonians with 3-mode periodic potentials, Advances in Math. arXiv.
133. (with H. Ishii, P. E. Souganidis) On the Langevin equation with variable friction, Calculus of Variations and PDE pdf.
134. (with J. Qian, Y. Yu) Min-max formulas and other properties of certain classes of nonconvex effective Hamiltonians, Mathematische Annalen arXiv.
135. A note on nonconvex Mean Field Games, Minimax Theory and its Applications pdf.
136. (with H. Ishii, H. Mitake) The vanishing discount problem and viscosity Mather measures. Part 2: boundary value problems, J. Math. Pures Appl. arXiv.
137. (with W. Jing, P. E. Souganidis) Stochastic homogenization of viscous superquadratic Hamilton-Jacobi equations in dynamic random environment, Research in the Mathematical Sciences arXiv. Distinguished paper award, ICCM, 2017.
138. (with D. Gomes, H. Mitake) The Selection problem for discounted Hamilton-Jacobi equations: some non-convex cases, Journal of the Mathematical Society of Japan (JMSJ) arXiv.
139. (with H. Ishii, H. Mitake) The vanishing discount problem and viscosity Mather measures. Part 1: the problem on a torus, J. Math. Pures Appl. arXiv.
140. (with W. Jing, Y. Yu) Inverse problems, non-roundedness and flat pieces of the effective burning velocity from an inviscid quadratic Hamilton-Jacobi model, Nonlinearity arXiv.
141. (with Y. Giga, H. Mitake) On asymptotic speed of solutions to level-set mean curvature flow equations with driving and source terms, SIAM Journal on Mathematical Analysis arXiv.
142. (with S. Luo, Y. Yu) Some inverse problems in periodic homogenization of Hamilton-Jacobi equations, Arch. Ration. Mech. Anal. arXiv.
143. (with H. Mitake, A. Siconolfi, N. Yamada) A Lagrangian Approach to Weakly Coupled Hamilton-Jacobi Systems, SIAM Journal on Mathematical Analysis arXiv.
144. (with S. Armstrong, Y. Yu) Stochastic homogenization of nonconvex Hamilton-Jacobi equations in one space dimension, J. Differential Equations arXiv.
145. (with H. Mitake) Selection problems for a discount degenerate viscous Hamilton-Jacobi equation, Advances in Math. arXiv.
146. (with W. Jing, P. E. Souganidis) Large time average of reachable sets and applications to homogenization of interfaces moving with oscillatory spatio-temporal velocity, DCDS-S arXiv.
147. (with A. Ciomaga, P. E. Souganidis) Stochastic homogenization of interfaces moving with changing sign velocity, J. Differential Equations arXiv.
148. (with H. Mitake) Weakly coupled systems of the infinity Laplace equations, Trans. Amer. Math. Soc. arXiv.
149. (with L. C. Evans, O. Kneuss) Partial regularity for minimizers of singular energy functionals, with application to liquid crystal models, Trans. Amer. Math. Soc. arXiv.
150. (with S. Armstrong, Y. Yu) Stochastic homogenization of a nonconvex Hamilton-Jacobi equation, Calculus of Variations and PDE arXiv.
151. (with S. Armstrong) Viscosity solutions of general viscous Hamilton-Jacobi equations, Mathematische Annalen arXiv.
152. (with S. Armstrong) Stochastic homogenization of viscous Hamilton-Jacobi equations and applications, Analysis and PDE arXiv.
153. (with H. Mitake) Large-time behavior for obstacle problems for degenerate viscous Hamilton--Jacobi equations, Calculus of Variations and PDE arXiv.
154. (with F. Cagnetti, D. Gomes, H. Mitake) A new method for large time behavior of degenerate viscous Hamilton--Jacobi equations with convex Hamiltonians, Ann. Inst. H. Poincaré Anal. Non Linéaire arXiv.
155. (with H. Mitake) A dynamical approach to the large-time behavior of solutions to weakly coupled systems of Hamilton--Jacobi equations, J. Math. Pures Appl. arXiv.
156. (with H. Mitake) Homogenization of weakly coupled systems of Hamilton--Jacobi equations with fast switching rates, Arch. Ration. Mech. Anal. arXiv.
157. (with F. Cagnetti, D. Gomes) Convergence of a Numerical Scheme for the Hamilton-Jacobi Equation: a New Approach with the Adjoint Method, Applied Numerical Mathematics arXiv.
158. (with H. Mitake) Remarks on the large time behavior of viscosity solutions of quasi-monotone weakly coupled systems of Hamilton-Jacobi equations, Asymptotic Analysis arXiv.
159. (with F. Cagnetti, D. Gomes) Adjoint methods for obstacle problems and weakly coupled systems of PDE, ESAIM: COCV arXiv.
160. (with F. Cagnetti, D. Gomes) Aubry-Mather measures in the non convex setting, SIAM Journal on Mathematical Analysis arXiv.
161. Adjoint methods for static Hamilton-Jacobi equations, Calculus of Variations and PDE Open access.

Undergraduate publications

2. (with Duong M. Duc and Nguyen T. Khai) Critical points of non-C2 functionals, Topol. Methods Nonlinear Anal. 29 (2007), no. 1, 35–68.
3. (with Duong M. Duc and Nguyen T. Khai) Morse-Palais lemma for nonsmooth functionals on normed spaces, Proc. Amer. Math. Soc. 135 (2007), no. 3, 921–927.

Unpublished works

1. (with W. Jing, P. E. Souganidis) Homogenization of interfaces moving in spatially random temporally periodic environment. pdf.

Books/Lecture notes

2. Hamilton--Jacobi equations: theory and applications, AMS Graduate Studies in Mathematics third draft. For earlier versions, see lecture notes.
3. (with Nam Q. Le, H. Mitake) Dynamical and Geometric Aspects of Hamilton-Jacobi and Linearized Monge-Ampere Equations, Springer Lecture Notes in Mathematics, vol. 2183, 2017, vii + 228. link.
   A version (12/2016) of the second part on “Dynamical properties of Hamilton--Jacobi equations via the nonlinear adjoint method: Large time behavior and Discounted approximation” of Mitake and myself can be found here pdf.

Thesis

Some new methods for Hamilton--Jacobi type nonlinear partial differential equations pdf.

Grants

• NSF grant DMS-2348305, 2024–2027.
• Vilas Faculty Early-Career Investigator Award, 2022–2024.
• Simons Fellowship, academic year 2021–2022.
• NSF CAREER grant DMS-1843320 link.
• NSF grant DMS-1664424 link.
• NSF grant DMS-1361236 link, transferred to Madison as DMS-1615944 link.