scientific article; zbMATH DE number 4956
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Publication:4712766
zbMath0764.47004MaRDI QIDQ4712766
Publication date: 25 June 1992
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Spectrum, resolvent (47A10) Perturbation theory of linear operators (47A55) (Semi-) Fredholm operators; index theories (47A53)
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