DIRECT SUM OF LOWER SEMI-FRAMES IN HILBERT SPACES

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dc.contributor.authorHemalatha, M.
dc.contributor.authorJohnson, P.S.
dc.contributor.authorHarikrishnan, P.K.
dc.date.accessioned2026-02-03T13:20:01Z
dc.date.issued2025
dc.description.abstractIn this paper, structural properties of lower semi-frames in separable Hilbert spaces are explored with a focus on transformations under linear operators (may be unbounded). Also, the direct sum of lower semi-frames, providing necessary and sufficient conditions for the preservation of lower semiframe structure, is examined. © 2025, Canadian University of Dubai. All rights reserved.
dc.identifier.citationGulf Journal of Mathematics, 2025, 19, 2, pp. 412-423
dc.identifier.urihttps://doi.org/10.56947/gjom.v19i2.2803
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/20319
dc.publisherCanadian University of Dubai
dc.subjectdirect sum
dc.subjectlower semi-frame
dc.subjectRiesz-Fischer sequence
dc.subjectSemi-frame
dc.titleDIRECT SUM OF LOWER SEMI-FRAMES IN HILBERT SPACES

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