Tatsuki Kawakami

ORCID: 0000-0002-0017-2502
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About
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Research Areas
  • Nonlinear Partial Differential Equations
  • Stability and Controllability of Differential Equations
  • Advanced Mathematical Modeling in Engineering
  • Advanced Mathematical Physics Problems
  • Nonlinear Differential Equations Analysis
  • Differential Equations and Boundary Problems
  • Numerical methods in inverse problems
  • advanced mathematical theories
  • Fractional Differential Equations Solutions
  • Differential Equations and Numerical Methods
  • Navier-Stokes equation solutions
  • Mathematical Biology Tumor Growth
  • Advanced Harmonic Analysis Research
  • Geometric Analysis and Curvature Flows
  • Phytochemicals and Antioxidant Activities
  • Topology Optimization in Engineering
  • Soviet and Russian History
  • Algebraic and Geometric Analysis
  • Cellular Mechanics and Interactions
  • Energy and Environmental Systems
  • Composite Structure Analysis and Optimization
  • Structural Analysis and Optimization
  • Plant Physiology and Cultivation Studies
  • Advanced Chemical Physics Studies
  • Gene Regulatory Network Analysis

Saga University
2018-2025

Ryukoku University
2018-2024

Shimane University
2021

Osaka Prefecture University
2013-2017

Tohoku University
2008-2017

Hiroshima University
2011

We studythe existence and the large time behavior of global-in-time solutions a nonlinear integral equation with generalized heat kernel\begin{eqnarray*} & u(x,t)=\int_{{\mathbb R}^N}G(x-y,t)\varphi(y)dy\\ \qquad\quad+\int_0^t\int_{{\mathbb R}^N}G(x-y,t-s)F(y,s,u(y,s),\dots,\nabla^\ell u(y,s))dyds,\end{eqnarray*}where $\varphi\in W^{\ell,\infty}({\mathbb R}^N)$ $\ell\in\{0,1,\dots\}$.The arguments this paper are applicable tothe Cauchy problem for various parabolic equationssuch as...

10.3934/dcdss.2014.7.767 article EN Discrete and Continuous Dynamical Systems - S 2014-01-01

10.1016/j.anihpc.2020.04.002 article EN Annales de l Institut Henri Poincaré C Analyse Non Linéaire 2020-04-23

We study the large time behavior of solutions for Cauchy problem, ∂ t u = Δu + a(x, t)u in ℝ N × (0, ∞), (x, 0) Q(x) , where Q ∈ L 1 (ℝ (1+|x| K ) dx) with ≥ 0 and ∥a(t)∥ ∞ O(t -A as → some A > 1. In this paper we classify decay rate give precise estimates on difference between their asymptotic profiles. Furthermore, an application, discuss global semilinear heat equation, λ|u| p-1 u, λ p

10.1512/iumj.2009.58.3771 article EN Indiana University Mathematics Journal 2009-01-01

We study the large time behavior of positive solutions forthe Laplace equation on half-space with a nonlinear dynamical boundary condition.We show convergence to Poisson kernel in suitable sense provided initial dataare sufficiently small.

10.3934/cpaa.2012.11.1285 article EN Communications on Pure &amp Applied Analysis 2012-01-01

10.1007/s00526-010-0316-4 article EN Calculus of Variations and Partial Differential Equations 2010-02-03

We consider the Cauchy problem for a nonlinear damped wave equation. Under suitable assumptions of term and initial functions, has global-in-time solution $u$ behaving like Gauss kernel as time tends to infinity. In this paper we show asymptotic profiles solutions give precise decay estimates on difference between their profiles. Our results are based $L^p$--$L^q$-type decomposition fundamental linearized equation expansion heat

10.57262/die/1369057817 article EN Differential and Integral Equations 2013-07-01

10.1016/j.jmaa.2020.123931 article EN publisher-specific-oa Journal of Mathematical Analysis and Applications 2020-02-05

The main purpose of the paper is to study large-time behavior positive solutions a semilinear elliptic equation with dynamical boundary condition. We show that small behave asymptotically like suitable multiples Poisson kernel.

10.57262/ade/1355867482 article EN Advances in Differential Equations 2013-01-01

10.1016/j.matpur.2015.11.014 article FR publisher-specific-oa Journal de Mathématiques Pures et Appliquées 2015-12-01

We consider the Cauchy problem of semilinear heat equation,$\partial_t u = \Delta +f(u)$ in $R^N \times (0,\infty),$$u (x,0) \phi (x) \ge 0$ $R^N,\quad\quad$where $N \geq 1$, $f \in C^1([0,\infty))$,and $\phi L^1(R^N) \cap L^{\infty}(R^N)$.We study asymptoticbehavior solutions $L^q$ spaces with $q [1,\infty]$,by using relative entropy methods.

10.3934/cpaa.2009.8.1351 article EN Communications on Pure &amp Applied Analysis 2009-01-01

In this paper we obtain the precise description of asymptotic behavior solution $u$ $$ \partial_t u+(-\Delta)^{\frac{\theta}{2}}u=0\quad\mbox{in}\quad{\bf R}^N\times(0,\infty), \qquad u(x,0)=\varphi(x)\quad\mbox{in}\quad{\bf R}^N, where $0<\theta<2$ and $\varphi\in L_K:=L^1({\bf R}^N,\,(1+|x|)^K\,dx)$ with $K\ge 0$. Furthermore, develop arguments in [15] [18] establish a method to expansions solutions nonlinear fractional diffusion equation...

10.1137/16m1101428 article EN SIAM Journal on Mathematical Analysis 2017-01-01

10.1007/s00030-016-0408-8 article EN Nonlinear Differential Equations and Applications NoDEA 2016-09-21

10.1016/j.jmaa.2010.02.007 article EN Journal of Mathematical Analysis and Applications 2010-02-19
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