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Angles and a Classification of Normed Spaces
generalized angle normed space Functional Analysis
2012/7/9
We suggest a concept of generalized `angles' in arbitrary real normed vector spaces. We give for each real number a definition of an `angle' by means of the shape of the unit ball. They all yield the ...
A type (4) space in (FR)-classification
Classification of Banach spaces quasi-minimal tight Banach spaces Functional Analysis
2012/6/19
We present a reflexive Banach space with an unconditional basis which is quasi-minimal and tight by range, i.e. of type (4) in Ferenczi-Rosendal list within the framework of Gowers' classification pro...