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math.FA2024
Asymptotic stability of the spectra of generalized indefinite strings
Guixin Xu, Meirong Zhang, Zhe Zhou
This paper focuses on the asymptotic stability of the spectra of generalized indefinite strings (GISs). A unitarily equivalent linear relation is introduced for GISs. It is shown t…
math.FA2016★ 1 cited
Boundedness and closedness of linear relations
Yuming Shi, Guixin Xu, Guojing Ren
This paper studies boundedness and closedness of linear relations, which include both single-valued and multi-valued linear operators. A new (single-valued) linear operator induced…