In this paper we discuss an abstract iteration scheme for the calculation ofthe smallest eigenvalue of an elliptic operator eigenvalue problem. A short andgeometric proof based on the preconditioned inverse iteration (PINVIT) formatrices [Knyazev and Neymeyr, (2009)] is extended to the case of operators. Weshow that convergence is retained up to any tolerance if one only usesapproximate applications of operators which leads to the perturbedpreconditioned inverse iteration (PPINVIT). We then analyze the Besovregularity of the eigenfunctions of the Poisson eigenvalue problem on apolygonal domain, showing the advantage of an adaptive solver to uniformrefinement when using a stable wavelet base. A numerical example for PPINVIT,applied to the model problem on the L-shaped domain, is shown to reproduce thepredicted behaviour.
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机译:在本文中,我们讨论了用于计算椭圆算子特征值问题的最小特征值的抽象迭代方案。基于预条件逆迭代(PINVIT)格式[Knyazev and Neymeyr,(2009)]的简短几何证明被扩展到算子的情况。我们表明,如果仅使用运算符的近似应用程序,那么收敛将保持到任何容限,这会导致扰动的预处理逆迭代(PPINVIT)。然后,我们分析了多边形区域上泊松特征值问题的特征函数的Besov正则性,显示了使用稳定小波基时自适应求解器对均匀精细化的优势。给出了一个PPINVIT的数值例子,该例子适用于L形域上的模型问题,可以重现预测的行为。
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