Trace class perturbation of closed linear relations

نویسندگان

چکیده

This paper studies trace class perturbation of closed linear relations in Hilbert spaces. The concept is introduced by orthogonal projections. Equivalent characterizations compact and block operator matrices are first given terms their elements, separately. By using them, several equivalent sufficient obtained.

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ژورنال

عنوان ژورنال: Linear Algebra and its Applications

سال: 2021

ISSN: ['1873-1856', '0024-3795']

DOI: https://doi.org/10.1016/j.laa.2020.10.022