scientific article; zbMATH DE number 4124413

zbMath0686.47006MaRDI QIDQ4204667

T. M. EL-Adawy

Publication date: 1988

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

self-adjoint operatoressentially self-adjoint operatordiameter of the spectrumdiameter of the essential spectrum

Mathematics Subject Classification ID

Spectrum, resolvent (47A10) Linear symmetric and selfadjoint operators (unbounded) (47B25)

Related Items (1)

Almost commuting matrices and a quantitative version of the Brown- Douglas-Fillmore theorem

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