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math.FA2019
A class of sectorial relations and the associated closed forms
Seppo Hassi, Henk de Snoo
Let be a closed linear relation from a Hilbert space to a Hilbert space and let be selfadjoint. It will be sho…
math.FA2019
Selfadjoint extensions of relations whose domain and range are orthogonal
Seppo Hassi, Jean-Philippe Labrousse, Henk de Snoo
The selfadjoint extensions of a closed linear relation from a Hilbert space to a Hilbert space are considered in the Hilbert space ${\mathfr…
math.FA2019
Factorized sectorial relations, their maximal sectorial extensions, and form sums
Seppo Hassi, Adrian Sandovici, Henk de Snoo
In this paper sectorial operators, or more generally, sectorial relations and their maximal sectorial extensions in a Hilbert space are considered. The particular i…