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pro vyhledávání: '"Tomasz Stypuła"'
Publikováno v:
Linear Algebra and its Applications. 531:305-317
In a normed space we consider an approximate orthogonality relation related to the Birkhoff orthogonality. We give some properties of this relation as well as applications. In particular, we characterize the approximate orthogonality in the class of
Autor:
Paweł Wójcik, Tomasz Stypuła
Publikováno v:
Annales Mathematicae Silesianae, Vol 30, Iss 1, Pp 193-201 (2016)
In this paper we consider the approximate orthogonalities in real normed spaces. Using the notion of approximate orthogonalities in real normed spaces, we provide some new characterizations of rotundity and smoothness of dual spaces.