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Publication:3955949
zbMath0493.47011MaRDI QIDQ3955949
Publication date: 1982
Full work available at URL: https://eudml.org/doc/209177
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essential spectrumapproximate point spectrumapproximate deficiency spectrumnullity and deficiency of operatorsoperators on tensor products of Banach spaces
Functional calculus for linear operators (47A60) Spectrum, resolvent (47A10) (Semi-) Fredholm operators; index theories (47A53) Tensor products in functional analysis (46M05)
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The structure of the essential spectrum and the discrete spectrum of the energy operator for six-electron systems in the Hubbard model. The second singlet state ⋮ Spectrum of the energy operator of a two-magnon system in the three-dimensional isotropic Heisenberg ferromagnet model with impurity ⋮ Structure of essential spectrum and discrete spectra of the energy operator of five-electron systems in the Hubbard model. Fourth quartet state ⋮ Spectral properties of three-electron systems in the Hubbard model ⋮ Spectrum of the energy operator of two-magnon systems in the isotropic Heisenberg ferromagnet model with impurity ⋮ The spectral picture of \((L_ A,R_ B)\)
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