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Savchenko, S.V. (2004) On the Change in the Spectral Properties of a Matrix under Perturbations of Sufficiently Low Rank. Functional Analysis and Its Appilications, 38, 69-71.
https://doi.org/10.1023/B:FAIA.0000024871.00388.4c

has been cited by the following article:

• TITLE: Structure of Essential Spectrum and Discrete Spectrum of the Energy Operator of Three-Magnon Systems in the Isotropic Ferromagnetic Non-Heisenberg Model with Spin One and Nearest-Neighbor Interactions

  AUTHORS: S. M. Tashpulatov

  KEYWORDS: Essential Spectrum, Discrete Spectrum, Three-Magnon Bound State, Two-Magnon Bound State, Non-Heisenberg Model

  JOURNAL NAME: Journal of Applied Mathematics and Physics, Vol.7 No.4, April 24, 2019

  ABSTRACT: We consider a three-magnon system in the isotropic ferromagnetic Non-Heisenberg model with spin one and with a coupling between nearest-neighbors. The structure of essential spectrum and discrete spectrum of the systems in a ν-dimensional lattice are investigated. We obtain the lower and upper estimates for the number of three-magnon bound states of the system.