Geodesic
Numeric method of finding the eigenvalues for the discrete lower semibounded operators
Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematičeskoe modelirovanie i programmirovanie, no. 8 (2011), pp. 46-51

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In the work the effective method of finding the eigenvalues of the perterbed discrete lower semibounded operators, when the eigenvalues of not perterbed operators have an arbitary multiplicity, is developed. New results, allowing to apply this method by experts, having basic knowledge in the area of the spectral theory of operators are received.
Keywords: amendments of the theory of pertubation, discrete and the self-adjoint operators, eigenvalues, eigenfunctions. 
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     author = {S. I. Kadchenko and L. S. Ryazanova},
     title = {Numeric method of finding the eigenvalues for the discrete lower semibounded operators},
     journal = {Vestnik \^U\v{z}no-Uralʹskogo gosudarstvennogo universiteta. Seri\^a, Matemati\v{c}eskoe modelirovanie i programmirovanie},
     pages = {46--51},
     publisher = {mathdoc},
     number = {8},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VYURU_2011_8_a4/}
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S. I. Kadchenko; L. S. Ryazanova. Numeric method of finding the eigenvalues for the discrete lower semibounded operators. Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematičeskoe modelirovanie i programmirovanie, no. 8 (2011), pp. 46-51. http://geodesic.mathdoc.fr/item/VYURU_2011_8_a4/