Professor Tatsuya Watanabe

Area and Subject Taught Functional Analysis
Research Theme(s) Research on elliptic PDEs by the variational method
Academic Degrees Doctor (Mathematics), Tokyo Metropolitan University
Keywords for Research Field Variational method, Elliptic PDE
Office Phone Number 81-75-705-1616
e-mail E-mail

Research Overview

Many differential equations which describe various natural phenomena have the variational structure and solutions can be obtained as critical points of the energy functional. When we study the dynamics of the solutions, it is important to know their characterizations and asymptotic behaviors. My research theme is to study the existence, characterizations, shapes and asymptotic behaviors of solutions of various differential equations which have the variational structure by analyzing the energy functional. Especially I’m interested in how physical parameters contained in differential equations can affect the solution set.
Among various differential equations, I’m mainly studying nonlinear elliptic partial differential equations which appear as stationary problems of nonlinear Schrödinger equations. Moreover, based on the analysis of the solution sets for stationary problems, I investigate the stability of standing waves for the corresponding evolution problems. I’m also studying mathematical models which describe the deformation of elastic membranes, eigenvalue optimization problems, asymptotic behavior of global solutions for parabolic PDEs and periodic solutions of hyperbolic PDEs.

Notable Publications and Works in the Last Three Years

  1. Marco Squassina and Tatsuya Watanabe, Uniqueness of limit flow for a class of quasi-linear parabolic equations, Advances in Nonlinear Analysis, 6 (2017), 243--276.
  2. Mathieu Colin and Tatsuya Watanabe, Standing waves for the nonlinear Schrödinger equation coupled with the Maxwell equation, Nonlinearity, 30 (2017), 1920--1947.
  3. Pablo Alvarez-Caudevilla and Tatsuya Watanabe, On the existence of coexistence states for an Advection-Cooperative system with spatial heterogeneities, Nonlinear Analysis, 152 (2017), 12--37.
  4. Shinji Adachi, Masataka Shibata and Tatsuya Watanabe, Global uniqueness results for ground states for a class of quasilinear elliptic equations, Kodai Mathematical Journal, 40 (2017), 117--142.