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Approximation of sign-indefinite spectral problems

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Abstract

A variational sign-indefinite eigenvalue problem in an infinite-dimensional Hilbert space is approximated by a problem in a finite-dimensional subspace. We analyze the convergence and accuracy of approximate eigenvalues and eigenelements. The general results are illustrated by a sample scheme of the finite-element method with numerical integration for a one-dimensional sign-indefinite second-order differential eigenvalue problem.

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Original Russian Text © S.I. Solov’ev, 2012, published in Differentsial’nye Uravneniya, 2012, Vol. 48, No. 7, pp. 1042–1055.

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Solov’ev, S.I. Approximation of sign-indefinite spectral problems. Diff Equat 48, 1028–1041 (2012). https://doi.org/10.1134/S0012266112070130

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