On rough norms on Banach spaces
Kamil John, Václav Zizler (1978)
Commentationes Mathematicae Universitatis Carolinae
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Kamil John, Václav Zizler (1978)
Commentationes Mathematicae Universitatis Carolinae
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Gilles Godefroy, Vicente Montesinos, Václav Zizler (1995)
Commentationes Mathematicae Universitatis Carolinae
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The strong subdifferentiability of norms (i.eȯne-sided differentiability uniform in directions) is studied in connection with some structural properties of Banach spaces. It is shown that every separable Banach space with nonseparable dual admits a norm that is nowhere strongly subdifferentiable except at the origin. On the other hand, every Banach space with a strongly subdifferentiable norm is Asplund.
Václav Zizler (1972)
Časopis pro pěstování matematiky
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