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• W2951569752 abstract "Investigating the stability of nonlinear waves often leads to linear or nonlinear eigenvalue problems for differential operators on unbounded domains. In this paper we propose to detect and approximate the point spectra of such operators (and the associated eigenfunctions) via contour integrals of solutions to resolvent equations. The approach is based on Keldysh' theorem and extends a recent method for matrices depending analytically on the eigenvalue parameter. We show that errors are well-controlled under very general assumptions when the resolvent equations are solved via boundary value problems on finite domains. Two applications are presented: an analytical study of Schrodinger operators on the real line as well as on bounded intervals and a numerical study of the FitzHugh-Nagumo system. We also relate the contour method to the well-known Evans function and show that our approach provides an alternative to evaluating and computing its zeroes." @default.
• W2951569752 created "2019-06-27" @default.
• W2951569752 creator A5012137394 @default.
• W2951569752 creator A5035072183 @default.
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• W2951569752 date "2012-10-15" @default.
• W2951569752 modified "2023-09-27" @default.
• W2951569752 title "Finding eigenvalues of holomorphic Fredholm operator pencils using boundary value problems and contour integrals" @default.
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• W2951569752 hasPublicationYear "2012" @default.
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