arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1102.4268math.AP
收藏

具有时间周期非捕获度规的wave equation在偶数维中的局部能量衰减及其在Escherichartz估计中的应用

Local energy decay in even dimensions for the wave equation with a time-periodic non-trapping metric and applications to Strichartz estimates

Yavar Kian

摘要:

我们得到了波动方程$\partial_t^2 u-div_x(a(t,x)\nabla_xu)=0,\ t\in{\R},\ x\in{\R}^n,$的解$u$的局部能量衰减和整体的Escherichartz估计,其中时间周期非捕获度量$a(t,x)$等于$1$。我们假设截断预解式$R_χ(θ)=χ(\mathcal U(T, 0)-e^{-iθ})^{-1}χ$,其中$\mathcal U(T, 0)$是单值算子,$T$是$a(t,x)$的周期,允许$\{θ\in\mathbb{C}\ :\ \textrm{Im}(θ) \geq 0\}$的全纯延拓,对于$n \geq 3$,奇,对于$n \geq4$,偶,对于$n \geq4$,偶$R_χ(θ)$,$\{ θ\in\mathbb C\ :\ \textrm{Im}(θ)\geq0,\ θ\neq 2kπ-iμ,\ k\in\mathbb{Z},\ μ\geq0\}$在$θ=0$的邻域内有界。

英文摘要:

We obtain local energy decay as well as global Strichartz estimates for the solutions $u$ of the wave equation $\partial_t^2 u-div_x(a(t,x)\nabla_xu)=0,\ t\in{\R},\ x\in{\R}^n,$ with time-periodic non-trapping metric $a(t,x)$ equal to $1$ outside a compact set with respect to $x$. We suppose that the cut-off resolvent $R_χ(θ)=χ(\mathcal U(T, 0)-e^{-iθ})^{-1}χ$, where $\mathcal U(T, 0)$ is the monodromy operator and $T$ the period of $a(t,x)$, admits an holomorphic continuation to $\{θ\in\mathbb{C}\ :\ \textrm{Im}(θ) \geq 0\}$, for $n \geq 3$ , odd, and to $\{ θ\in\mathbb C\ :\ \textrm{Im}(θ)\geq0,\ θ\neq 2kπ-iμ,\ k\in\mathbb{Z},\ μ\geq0\}$ for $n \geq4$, even, and for $n \geq4$ even $R_χ(θ)$ is bounded in a neighborhood of $θ=0$.

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。

↑