arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0710.3665math.SPmath.AP
收藏

平面域上本征函数的渐近性

Asymptotics of eigenfunctions on plane domains

Daniel Grieser, David Jerison

摘要:

我们考虑一族域$(Ω_N)_{N>0}$,它是通过将$N\times 1$矩形附加到固定集合$Ω_0 = \{(x,y): 0<y<1, -ϕ(y)<x<0\}$上而得到的,对于Lipschitz函数$ϕ\geq 0$。我们得到充分的渐近展开式,作为$N\to\infty$,$m$ th狄利克雷本征值(任何固定$m$)和相关的特征函数$Ω_N$。第二项涉及在无限域$Ω_\infty$上的狄利克雷问题中产生的散射相。我们确定该散射相位的第一个变化,相对于$ϕ$,在$ϕ\equiv 0$。然后,这是用来证明锋利的结果,以前得到的相同的作者,关于凸域上的极值和本征函数的节点线的位置。

英文摘要:

We consider a family of domains $(Ω_N)_{N>0}$ obtained by attaching an $N\times 1$ rectangle to a fixed set $Ω_0 = \{(x,y): 0<y<1, -ϕ(y)<x<0\}$, for a Lipschitz function $ϕ\geq 0$. We derive full asymptotic expansions, as $N\to\infty$, for the $m$th Dirichlet eigenvalue (for any fixed $m$) and for the associated eigenfunction on $Ω_N$. The second term involves a scattering phase arising in the Dirichlet problem on the infinite domain $Ω_\infty$. We determine the first variation of this scattering phase, with respect to $ϕ$, at $ϕ\equiv 0$. This is then used to prove sharpness of results, obtained previously by the same authors, about the location of extrema and nodal line of eigenfunctions on convex domains.

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。

↑