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arXiv 0810.3823math.APmath.SP
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变域上椭圆算子的预解式、特征值和特征函数的稳定性估计

Stability estimates for resolvents, eigenvalues and eigenfunctions of elliptic operators on variable domains

G. Barbatis, V. I. Burenkov, P. D. Lamberti

摘要:

考虑了一般二阶一致椭圆算子在由Lipschitz同胚$ϕ$参数化的开集$ϕ(Ω)$上的齐次边界条件,该同胚定义在固定的参考区域$Ω$上.给定两个开集$ϕ(Ω)$,$\tilde ϕ(Ω)$,在本征函数及其梯度的自然可和性条件下,通过对$p$的有限值的Sobolev范数$\|\tilde ϕ-ϕ\|_{W^{1,p}(Ω)}$,我们估计了预解式、本征值和本征函数的变化.我们证明了这样的条件是满足广泛的一类运营商和开集,包括Lipschitz连续边界的开集。我们应用这些估计来控制的变化的特征值和特征函数的开集的对称差的措施。我们还讨论了一个应用程序的泊松问题的解决方案的稳定性。

英文摘要:

We consider general second order uniformly elliptic operators subject to homogeneous boundary conditions on open sets $ϕ(Ω)$ parametrized by Lipschitz homeomorphisms $ϕ$ defined on a fixed reference domain $Ω$. Given two open sets $ϕ(Ω)$, $\tilde ϕ(Ω)$ we estimate the variation of resolvents, eigenvalues and eigenfunctions via the Sobolev norm $\|\tilde ϕ-ϕ\|_{W^{1,p}(Ω)}$ for finite values of $p$, under natural summability conditions on eigenfunctions and their gradients. We prove that such conditions are satisfied for a wide class of operators and open sets, including open sets with Lipschitz continuous boundaries. We apply these estimates to control the variation of the eigenvalues and eigenfunctions via the measure of the symmetric difference of the open sets. We also discuss an application to the stability of solutions to the Poisson problem.

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