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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 ...
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 ...