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arXiv 1908.05029math.NAcs.NAmath.SP
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全纯本征值问题的Galerkin逼近:弱T-收敛性和T-相容性

Galerkin approximation of holomorphic eigenvalue problems: weak T-coercivity and T-compatibility

Martin Halla

摘要:

本文考虑了全纯弗雷德霍姆算子本征值问题的Galerkin逼近,其中算子值不具有“强制+紧”结构.在这种情况下,正则性(在[O。因果报应,努默。功能Anal. Optim。17(1996)])的Galerkin近似不是无条件满足的,收敛性问题是微妙的。我们报告了一种技术,以证明正则性的近似,这是适用于广泛的本征值问题。特别地,我们引入了弱T-强制性和T-相容性的概念,并证明了对于弱T-强制算子,Galerkin逼近的T-相容性蕴涵了它们的正则性。我们的框架立即改进了[T.霍哈格湖Nannen,BIT 55(1)(2015)],可直接用于分析与[A.- S. Bonnet-Ben Dhia,C. Carvalho,P. Ciarlet,P. Math.138(4)(2018)],并且已经应用于[G. Unger,预印本(2017年)]。

英文摘要:

We consider Galerkin approximations of holomorphic Fredholm operator eigenvalue problems for which the operator values don't have the structure "coercive+compact". In this case the regularity (in sense of [O. Karma, Numer. Funct. Anal. Optim. 17 (1996)]) of Galerkin approximations is not unconditionally satisfied and the question of convergence is delicate. We report a technique to prove regularity of approximations which is applicable to a wide range of eigenvalue problems. In particular, we introduce the concepts of weak T-coercivity and T-compatibility and prove that for weakly T-coercive operators, T-compatibility of Galerkin approximations implies their regularity. Our framework immediately improves the results of [T. Hohage, L. Nannen, BIT 55(1) (2015)], is immediately applicable to analyze approximations of eigenvalue problems related to [A.-S. Bonnet-Ben Dhia, C. Carvalho, P. Ciarlet, Num. Math. 138(4) (2018)] and is already applied in [G. Unger, preprint (2017)].

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