Updated on 2025/12/06

写真a

 
YAMAMOTO, Tatsuki
 
Affiliation
Faculty of Science and Engineering, School of Fundamental Science and Engineering
Job title
Assistant Professor(non-tenure-track)
Degree
Doctor of Science ( 2025.03 Waseda University )
Mail Address
メールアドレス

Research Experience

  • 2025.04
    -
    Now

    Waseda University   Department of Mathematics, School of Fundamental Science and Engineering   Assistant Professor

  • 2022.04
    -
    2025.03

    Waseda University   Faculty of Science and Engineering   Research Fellowship for Young Scientists (DC1), Japan Society for the Promotion of Science

Education Background

  • 2021.09
    -
    2025.03

    Waseda University   Graduate School of Fundamental Science and Engineering   Doctoral Program in Department of Pure and Applied Mathematics  

  • 2020.04
    -
    2021.09

    Waseda University   Graduate School of Fundamental Science and Engineering   Master's Program in Department of Pure and Applied Mathematics  

  • 2017.04
    -
    2020.03

    Waseda University   School of Fundamental Science and Engineering   Department of Mathematics  

  • 2016.04
    -
    2017.03

    Waseda University   School of Fundamental Science and Engineering  

  • 2013.04
    -
    2016.03

    Saitama Prefectural Kawagoe High School  

Professional Memberships

 

Papers

Presentations

  • The flux problem for the steady-state Navier-Stokes equations with nonhomogeneous slip boundary conditions

    Tatsuki Yamamoto  [Invited]

    Mathematical Analysis of Viscous Incompressible Fluid  (Research Institute for Mathematical Sciences, Kyoto University) 

    Presentation date: 2025.12

    Event date:
    2025.12
     
     
  • Nonhomogeneous boundary value problem for the steady Navier-Stokes equations in multiply-connected domains

    Tatsuki Yamamoto  [Invited]

    Mini Workshop on Nonlinear PDEs  (Institute of Science Tokyo) 

    Presentation date: 2025.08

     View Summary

    We consider the nonhomogeneous boundary value problem for the steady Navier-Stokes equations under the slip boundary conditions in a two-dimensional bounded domain with multiple boundary components. By the incompressibility condition of the fluid, the total flux of the given boundary datum through the boundary must be zero. We prove that this problem has a solution if the friction coefficient is sufficiently large compared with the kinematic viscosity constant and the curvature of the boundary. No additional assumption (other than the necessary requirement of zero total flux through the boundary) is imposed on the boundary datum. This talk is based on the joint work with Prof. Giovanni P. Galdi (University of Pittsburgh).

  • The flux problem for the steady-state Navier-Stokes equations with nonhomogeneous slip boundary conditions

    Tatsuki Yamamoto  [Invited]

    京都大学NLPDEセミナー  (Kyoto University) 

    Presentation date: 2025.05

     View Summary

    We consider the nonhomogeneous boundary value problem for the steady Navier-Stokes equations under the slip boundary conditions in a two-dimensional bounded domain with multiple boundary components. By the incompressibility condition of the fluid, the total flux of the given boundary datum through the boundary must be zero. We prove that this problem has a solution if the friction coefficient is sufficiently large compared with the kinematic viscosity constant and the curvature of the boundary. No additional assumption (other than the necessary requirement of zero total flux through the boundary) is imposed on the boundary datum. This talk is based on the joint work with Prof. Giovanni P. Galdi (University of Pittsburgh).

  • 多重連結領域における定常Navier-Stokes方程式の非斉次境界値問題

    Tatsuki Yamamoto  [Invited]

    第44回さいたま数理解析セミナー  (Omiya Sonic City) 

    Presentation date: 2025.03

  • The flux problem for the steady-state Navier-Stokes equations with nonhomogeneous slip boundary conditions

    Tatsuki Yamamoto  [Invited]

    PDE and Analysis Seminar  (University of Pittsburgh) 

    Presentation date: 2025.02

     View Summary

    We consider the nonhomogeneous boundary value problem for the stationary Navier-Stokes equations under the slip boundary conditions in a two-dimensional bounded domain with multiple boundary components. By the incompressibility condition of the fluid, the total flux of the given boundary datum through the boundary must be zero. It is shown that this problem admits at least one weak solution if the friction coefficient is sufficiently large compared with the kinematic viscosity constant and the curvature of the boundary. No additional assumption (other than the necessary requirement of zero total flux through the boundary) is imposed on the boundary datum. This talk is based on the joint work with Prof. Giovanni P. Galdi (University of Pittsburgh).

  • 多重連結領域における非斉次slip境界条件を課した定常Navier-Stokes方程式の可解性

    山本立規  [Invited]

    若手による流体力学の基礎方程式研究集会  (Nagoya University) 

    Presentation date: 2025.01

    Event date:
    2025.01
     
     
  • The flux problem for the steady-state Navier-Stokes equations with nonhomogeneous slip boundary conditions

    Tatsuki Yamamoto  [Invited]

    名古屋微分方程式セミナー  (Nagoya University) 

    Presentation date: 2024.12

     View Summary

    We consider the nonhomogeneous boundary value problem for the steady Navier-Stokes equations under the slip boundary conditions in a two-dimensional bounded domain with multiple boundary components. By the incompressibility condition of the fluid, the total flux of the given boundary datum through the boundary must be zero. We prove that this problem has a solution if the friction coefficient is sufficiently large compared with the kinematic viscosity constant and the curvature of the boundary. No additional assumption (other than the necessary requirement of zero total flux through the boundary) is imposed on the boundary datum. This talk is based on the joint work with Prof. Giovanni P. Galdi (University of Pittsburgh).

  • Nonhomogeneous boundary value problem for the steady Navier–Stokes equations with the slip boundary conditions

    Giovanni Paolo Galdi, Tatsuki Yamamoto

    日本数学会2024年度秋季総合分科会  (Osaka University) 

    Presentation date: 2024.09

    Event date:
    2024.09
     
     

     View Summary

    We consider the nonhomogeneous boundary value problem for the steady Navier–Stokes equations under the slip boundary conditions in a two-dimensional bounded domain with multiple boundary components. By the incompressibility condition of the fluid, the total flux of the given boundary datum through the boundary must be zero. We prove that this problem has a solution if the friction coefficient is sufficiently large compared with the kinematic viscosity constant and the curvature of the boundary. No additional assumption (other than the necessary requirement of zero total flux through the boundary) is imposed on the boundary data. The required a priori estimate to apply the Leray–Schauder fixed point theorem is proved by a contradiction argument.

  • Nonhomogeneous boundary value problem for the steady Navier-Stokes equations in multiply-connected domains

    Tatsuki Yamamoto  [Invited]

    Taiwan-Waseda Joint Workshop on Partial Differential Equations and Mathematical Modelings  (Waseda University) 

    Presentation date: 2024.08

     View Summary

    We consider the nonhomogeneous boundary value problem for the steady Navier- Stokes equations under the slip boundary conditions in a two-dimensional bounded domain with multiple boundary components. By the incompressibility condition of the fluid, the total flux of the given boundary datum through the boundary must be zero. We prove that this problem has a solution if the friction coefficient is sufficiently large compared with the kinematic viscosity constant and the curvature of the boundary. No additional assumption (other than the necessary requirement of zero total flux through the boundary) is imposed on the boundary data. We also show that such an assumption on the friction coefficient is redundant for the existence of a solution in the case when the fluxes across each connected component of the boundary are sufficiently small, or the domain and the given data satisfy certain symmetry conditions. This talk is based on the joint work with Prof. Giovanni P. Galdi (University of Pittsburgh).

  • Nonhomogeneous boundary value problem for the steady Navier-Stokes equations in multiply-connected domains

    Tatsuki Yamamoto

    Mathematical Fluid Mechanics In 2024  (Institute of Mathematics of the Academy of Sciences of Czech Republic) 

    Presentation date: 2024.08

    Event date:
    2024.08
     
     

     View Summary

    We consider the nonhomogeneous boundary value problem for the steady Navier-Stokes equations under the slip boundary conditions in a two-dimensional bounded domain with multiple boundary components. By the incompressibility condition of the fluid, the total flux of the given boundary datum through the boundary must be zero. We prove that this problem has a solution if the friction coefficient is sufficiently large compared with the kinematic viscosity constant and the curvature of the boundary. No additional as- sumption (other than the necessary requirement of zero total flux through the boundary) is imposed on the boundary datum. We also show that such an assumption on the friction coefficient is redundant for the existence of a solution in the case when the fluxes across each connected component of the boundary are sufficiently small, or the domain and the given data satisfy certain symmetry conditions. This talk is based on the joint work with Prof. Giovanni P. Galdi (University of Pittsburgh).

  • Nonhomogeneous boundary value problem for the steady Navier-Stokes equations in two-dimensional multiply-connected bounded domains

    Tatsuki Yamamoto  [Invited]

    第9回 流体数学セミナー  (Ochanomizu University) 

    Presentation date: 2024.05

     View Summary

    We consider the nonhomogeneous boundary value problem for the steady Navier-Stokes equations under the slip boundary conditions in a two-dimensional bounded domain with multiple boundary components. By the incompressibility condition of the fluid, the total flux of the given boundary datum through the boundary must be zero. We prove that this problem has a solution if the friction coefficient is sufficiently large compared with the kinematic viscosity constant and the curvature of the boundary. No additional assumption (other than the necessary requirement of zero total flux through the boundary) is imposed on the boundary data. We also show that such an assumption on the friction coefficient is redundant for the existence of a solution in the case when the fluxes across each connected component of the boundary are sufficiently small, or the domain and the given data satisfy certain symmetry conditions. This talk is based on the joint work with Prof. Giovanni P. Galdi (University of Pittsburgh).

  • Nonhomogeneous boundary value problem for the steady Navier-Stokes equations with the slip boundary conditions in two-dimensional multiply-connected bounded domains

    Tatsuki Yamamoto  [Invited]

    PDE and Analysis Seminar  (University of Pittsburgh) 

    Presentation date: 2024.02

  • Logarithmically Improved Extension Criteria Involving the Pressure for the Navier–Stokes Equations in $\mathbb {R}^{3}$

    Tatsuki Yamamoto  [Invited]

    PDE and Analysis Seminar  (University of Pittsburgh) 

    Presentation date: 2022.11

  • Logarithmically Improved Extension Criteria Involving the Pressure for the Navier–Stokes Equations in $\mathbb {R}^{3}$

    Tatsuki Yamamoto  [Invited]

    第2回 非線形PDE若手ワークショップ  (Online) 

    Presentation date: 2022.03

  • Logarithmically Improved Extension Criteria Involving the Pressure for the Navier–Stokes Equations in $\mathbb {R}^{3}$

    Tatsuki Yamamoto  [Invited]

    International Workshop on Multiphase Flows: Analysis, Modelling and Numerics  (Online) 

    Presentation date: 2021.12

    Event date:
    2021.11
    -
    2021.12
  • Logarithmically Improved Extension Criteria Involving the Pressure for the Navier–Stokes Equations in $\mathbb {R}^{3}$

    Ryo Kanamaru, Tatsuki Yamamoto

    日本数学会2021年度秋季総合分科会  (Online) 

    Presentation date: 2021.09

    Event date:
    2021.09
     
     
  • Logarithmically Improved Extension Criteria Involving the Pressure for the Navier–Stokes Equations in $\mathbb {R}^{3}$

    Tatsuki Yamamoto

    第42回発展方程式若手セミナー  (Online) 

    Presentation date: 2021.09

    Event date:
    2021.08
    -
    2021.09

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Research Projects

  • Mathematical analysis of the steady flow of a viscous fluid depending on topological properties of the domain

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research

    Project Year :

    2022.04
    -
    2025.03
     

    Tatsuki Yamamoto

     [International coauthorship]

  • Mathematical analysis of the steady flow of a viscous fluid depending on topological properties of the domain

    Japan Science and Technology Agency  Support for Pioneering Research Initiated by the Next Generation (SPRING)

    Project Year :

    2021.10
    -
    2022.03
     

    Tatsuki Yamamoto

Misc

  • Logarithmically Improved Extension Criteria Involving the Pressure for the Navier–Stokes Equations in $\mathbb {R}^{3}$

    Tatsuki Yamamoto

        249 - 256  2022.02

    Authorship:Lead author, Corresponding author

    Research paper, summary (national, other academic conference)  

Other

  • Student member of Mathematics and Physics Unit "Multiscale Analysis, Modelling and Simulation", Top Global University Project, Waseda University

    2021.09
    -
    2025.03

     View Summary

    https://www.waseda.jp/fsci/mathphys/

 

Syllabus

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Teaching Experience