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Factorized sectorial relations, their maximal-sectorial extensions, and form sums
In this paper we consider sectorial operators, or more generally, sectorial relations and their maximal-sectorial extensions in a Hilbert space H. Our particular interest is in sectorial relations S, which can be expressed ...
Boundary value problems, Weyl functions, and differential operators
(Birkhäuser, Cham, 2020)
This open access book presents a comprehensive survey of modern operator techniques for boundary value problems and spectral theory, employing abstract boundary mappings and Weyl functions. It includes self-contained ...