A general version of Neubauer’s lemma and closed range almost closed operators
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DOI: 10.1142/s1793557120501247
Abstract: In this paper, almost closed subspaces and almost closed linear operators are described in a Hilbert space. We show Neubauer’s lemma and we give necessary and sufficient conditions for an almost closed operator to be… read more here.
Keywords: general version; closed range; neubauer lemma; almost closed ... See more keywords