Banach spaces which are semi-L-summands in their biduals. (English) Zbl 0729.46008
See the preview in Zbl 0712.46005.
MSC:
| 46B20 | Geometry and structure of normed linear spaces |
| 46A55 | Convex sets in topological linear spaces; Choquet theory |
| 52A07 | Convex sets in topological vector spaces (aspects of convex geometry) |
Keywords:
a Banach space can be a semi-L-summand and not an L-summand in its bidual; unique best approximation; metric projection; infinite- dimensional sets of constant width; pseudoball; intersection property; proper M-ideals; nonlinear version of E. Behrends’ L-M theoremCitations:
Zbl 0712.46005References:
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