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In this reviewing paper, we are interested in the proof of estimating the lifespan of classical solutions of semilinear wave equations with the critical exponent from above especially in low space dimensions. There are a few ways to show…

偏微分方程分析 · 数学 2025-12-09 Hiroyuki Takamura

In this paper we establish blow-up results and lifespan estimates for semilinear wave equations with scattering damping and negative mass term for subcritical power, which is the same as that of the corresponding problem without mass term,…

偏微分方程分析 · 数学 2021-01-19 Ning-An Lai , Nico Michele Schiavone , Hiroyuki Takamura

This paper is devoted to a simple and short proof on the sharp upper bound of lifespan of classical solutions to wave equations with the critical power nonlinearities of spatial derivatives of the unknown function. Such a proof is so-called…

偏微分方程分析 · 数学 2025-07-30 Takiko Sasaki , Kerun Shao , Hiroyuki Takamura

For small-amplitude semilinear wave equations with power type nonlinearity on the first-order spatial derivative, the expected sharp upper bound on the lifespan of solutions is obtained for both critical cases and subcritical cases, for all…

偏微分方程分析 · 数学 2024-06-05 Kerun Shao , Hiroyuki Takamura , Chengbo Wang

This paper studies the upper bound of the lifespan of classical solutions of the initial value problems for one dimensional wave equations with quasilinear terms of space-, or time-derivatives of the unknown function. The results are same…

偏微分方程分析 · 数学 2024-09-11 Yuki Haruyama , Hiroyuki Takamura

In this paper, we prove some blow-up results for the semilinear wave equation in generalized Einstein-de Sitter spacetime by using an iteration argument and we derive upper bound estimates for the lifespan. In particular, we will focus on…

偏微分方程分析 · 数学 2022-06-22 Alessandro Palmieri

In this paper, we give a small data blow-up result for the one-dimensional semilinear wave equation with damping depending on time and space variables. We show that if the damping term can be regarded as perturbation, that is, non-effective…

偏微分方程分析 · 数学 2015-08-21 Yuta Wakasugi

We consider in this paper blow-up solutions of the semilinear wave equation in one space dimension, with an exponential source term. Assuming that initial data are in $H^{1}_{loc}\times L^2_{loc}$ or some times in $ W^{1,\infty}\times…

偏微分方程分析 · 数学 2016-01-22 Asma Azaiez , Nader Masmoudi , Hatem Zaag

In this article, we investigate the blow-up for local solutions to a semilinear wave equation in the generalized Einstein - de Sitter spacetime with nonlinearity of derivative type. More precisely, we consider a semilinear damped wave…

偏微分方程分析 · 数学 2022-06-22 Makram Hamouda , Mohamed Ali Hamza , Alessandro Palmieri

In this paper we prove the blow-up theorem in the critical case for weakly coupled systems of semilinear wave equations in high dimensions. The upper bound of the lifespan of the solution is precisely clarified.

偏微分方程分析 · 数学 2014-04-22 Yuki Kurokawa , Hiroyuki Takamura , Kyouhei Wakasa

This paper studies the upper and lower bounds of the lifespan for the classical solutions to the initial value problems of one dimensional wave equations with non-autonomous semilinear terms including the space-derivative of the unknown…

偏微分方程分析 · 数学 2026-05-11 Ning-An Lai , Cui Ren , Takiko Sasaki , Hiroyuki Takamura

We study blow-up behavior of solutions for the Cauchy problem of the semilinear wave equation with time-dependent damping. When the damping is effective, and the nonlinearity is subcritical, we show the blow-up rates and the sharp lifespan…

偏微分方程分析 · 数学 2021-12-14 Kazumasa Fujiwara , Masahiro Ikeda , Yuta Wakasugi

In this work we derive some blow-up results for semilinear wave equations both in de Sitter and anti-de Sitter spacetimes. By requiring suitable conditions on a time-dependent factor in the nonlinear term, we prove the blow-up in finite…

偏微分方程分析 · 数学 2022-06-22 Alessandro Palmieri , Hiroyuki Takamura

In this paper, we study the semilinear wave equations with the inverse-square potential. By transferring the original equation to a "fractional dimensional" wave equation and analyzing the properties of its fundamental solution, we…

偏微分方程分析 · 数学 2021-11-23 Wei Dai , Daoyuan Fang , Chengbo Wang

This paper is devoted to the lifespan estimates of small classical solutions of the initial value problems for one dimensional wave equations with semilinear terms of the spatial derivative of the unknown function. It is natural that the…

偏微分方程分析 · 数学 2023-09-19 Takiko Sasaki , Shu Takamatsu , Hiroyuki Takamura

In this paper, we study the blow-up of solutions for semilinear wave equations with scale-invariant dissipation and mass in the case in which the model is somehow 'wave-like'. A Strauss type critical exponent is determined as the upper…

偏微分方程分析 · 数学 2018-12-19 Alessandro Palmieri , Ziheng Tu

In this paper we consider the blow-up of solutions to a weakly coupled system of semilinear damped wave equations in the scattering case with nonlinearities of mixed type, namely, in one equation a power nonlinearity and in the other a…

偏微分方程分析 · 数学 2020-11-03 Alessandro Palmieri , Hiroyuki Takamura

In this manuscript, a sharp lifespan estimate of solutions to semilinear classical damped wave equation is investigated in one dimensional case, when the sum of initial position and speed is $0$ pointwisely. Especially, an extension of…

偏微分方程分析 · 数学 2022-12-29 Kazumasa Fujiwara , Vladimir Georgiev

In this paper, we consider the blow-up problem of semilinear generalized Tricomi equation. Two blow-up results with lifespan upper bound are obtained under subcritical and critical Strauss type exponent. In the subcritical case, the proof…

偏微分方程分析 · 数学 2019-06-04 Jiayun Lin , Ziheng Tu

In this paper, we investigate the problem of blow up and sharp upper bound estimates of the lifespan for the solutions to the semilinear wave equations, posed on asymptotically Euclidean manifolds. Here the metric is assumed to be…

偏微分方程分析 · 数学 2019-12-06 Mengyun Liu , Chengbo Wang
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