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arXiv · 2506.14357

$C$-self-adjoint contractive extensions of $C$-symmetric non-densely defined contractions

Yury Arlinskii·Konrad Schmüdgen
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Abstract

Given a conjugation (involution) $C$ on a Hilbert space, $C$-self-adjoint contractive extensions of a non-densely defined $C$-symmetric contraction are studied and parameterizations of all such extensions are obtained. As an application, a proof of an announced result of Glazman \cite{Glazman1} on the existence of maximal dissipative $C$-self-adjoint extensions of a densely defined $C$-symmetric dissipative operator is given.

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Yury Arlinskii, Konrad Schmüdgen. 2025-06-17. $C$-self-adjoint contractive extensions of $C$-symmetric non-densely defined contractions. https://arxiv.org/abs/2506.14357

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