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arXiv 2101.06012math.AP
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非线性Kirchhoff型双曲型方程的动力学

Dynamics of nonlinear hyperbolic equations of Kirchhoff type

Jianyi Chen, Yimin Sun, Zonghu Xiu, Zhitao Zhang

摘要:

本文研究了一类重要的双曲型Kirchhoff方程$$u_{tt}-\left(a \int_Ω|\nabla u|^2 \dif x +b\right)Δu = λu+ |u|^{p-1}u ,$$的初边值问题,其中$a$,$b>0$,$p>1$,$λ\in \mathbb{R}$,初始能量任意大.我们证明了几个新的动力学定理,如在不同的$a$,$b$,$λ$和初始数据范围下解的有界性或有限时间爆破:(i)$1<p<3$,(ii)$p=3$和$a>1/Λ$,(iii)$p=3$、$a \leq 1/Λ$和$\lam <b\lam_1$,(iv)$p=3$、$a < 1/Λ$和$\lam >b\lam_1$,(v)$p>3$和$\lam\leq b\lam_1$,(vi)$p>3$和$\lam> b\lam_1$,其中$\lam_1 = \inf\left\{\|\nabla u\|^2_2 :~ u\in H^1_0(Ω)\ {\rm and}\ \|u\|_2 =1\right\}$和$Λ= \inf\left\{\|\nabla u\|^4_2 :~ u\in H^1_0(Ω)\ {\rm and}\ \|u\|_4 =1\right\}$。此外,我们证明了对于适当的$a$,$b$和$\lam$,解的某些稳定和不稳定集的不变性,并给出了初始数据产生解的真空区域的充分条件.由于非局部积分微分项的非局部效应,我们发现$a>0$和$a=0$的问题的爆破现象之间有许多有趣的差异。

英文摘要:

In this paper, we study the initial boundary value problem of the important hyperbolic Kirchhoff equation $$u_{tt}-\left(a \int_Ω|\nabla u|^2 \dif x +b\right)Δu = λu+ |u|^{p-1}u ,$$ where $a$, $b>0$, $p>1$, $λ\in \mathbb{R}$ and the initial energy is arbitrarily large. We prove several new theorems on the dynamics such as the boundedness or finite time blow-up of solution under the different range of $a$, $b$, $λ$ and the initial data for the following cases: (i) $1<p<3$, (ii) $p=3$ and $a>1/Λ$, (iii) $p=3$, $a \leq 1/Λ$ and $\lam <b\lam_1$, (iv) $p=3$, $a < 1/Λ$ and $\lam >b\lam_1$, (v) $p>3$ and $\lam\leq b\lam_1$, (vi) $p>3$ and $\lam> b\lam_1$, where $\lam_1 = \inf\left\{\|\nabla u\|^2_2 :~ u\in H^1_0(Ω)\ {\rm and}\ \|u\|_2 =1\right\}$, and $Λ= \inf\left\{\|\nabla u\|^4_2 :~ u\in H^1_0(Ω)\ {\rm and}\ \|u\|_4 =1\right\}$. Moreover, we prove the invariance of some stable and unstable sets of the solution for suitable $a$, $b$ and $\lam$, and give the sufficient conditions of initial data to generate a vacuum region of the solution. Due to the nonlocal effect caused by the nonlocal integro-differential term, we show many interesting differences between the blow-up phenomenon of the problem for $a>0$ and $a=0$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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