scientific article; zbMATH DE number 1019504

zbMath0894.47021MaRDI QIDQ4340486

Hassi, Seppo, Hendrik S. V. de Snoo

Publication date: 9 July 1997

Full work available at URL: https://eudml.org/doc/223961

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

zbMATH Keywords

multiplication operatorselfadjoint operatordefect numberssymmetric operatorNevanlinna functionsorthogonal operator part\(Q\)-functionsselfadjoint extensionselfadjoint relationgraph perturbationsKreĭn's description

Mathematics Subject Classification ID

Hermitian and normal operators (spectral measures, functional calculus, etc.) (47B15) Perturbation theory of linear operators (47A55) Linear symmetric and selfadjoint operators (unbounded) (47B25) Linear operator methods in interpolation, moment and extension problems (47A57) Dilations, extensions, compressions of linear operators (47A20)

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