Orthogonality in locally convex spaces: two nonlinear generalizations of Neumann's lemma

DOI10.1016/j.jmaa.2019.123663zbMath1477.47003OpenAlexW2985260619WikidataQ124972820 ScholiaQ124972820MaRDI QIDQ2287264

Annamaria Barbagallo, Michel Théra, Octavian-Emil Ernst

Publication date: 20 January 2020

Published in: Journal of Mathematical Analysis and Applications (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1016/j.jmaa.2019.123663

zbMATH Keywords

Birkhoff-James orthogonalityNeumann lemmaBirkhoff-Kakutani-Day-James theoremCampanato nearnessCasazza-Christenses lemmaSöderlind-Campanato lemma

Mathematics Subject Classification ID

Geometry and structure of normed linear spaces (46B20) General (adjoints, conjugates, products, inverses, domains, ranges, etc.) (47A05) Operators on Banach spaces (47B01)

Related Items (1)

Nearness of nonlinear operators

Cites Work

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• Orthogonality in Generalized Minkowski Spaces
• Some Characterizations of Inner-Product Spaces
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• Functional Analysis

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