Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8896784 | Journal of Functional Analysis | 2018 | 25 Pages |
Abstract
The Bishop-Phelps-Bollobás property deals with simultaneous approximation of an operator T and a vector x at which T nearly attains its norm by an operator T0 and a vector x0, respectively, such that T0 attains its norm at x0. In this note we extend the already known results about the Bishop-Phelps-Bollobás property for Asplund operators to a wider class of Banach spaces and to a wider class of operators. Instead of proving a BPB-type theorem for each space separately we isolate two main notions: Î-flat operators and Banach spaces with ACKÏ structure. In particular, we prove a general BPB-type theorem for Î-flat operators acting to a space with ACKÏ structure and show that uniform algebras and spaces with the property β have ACKÏ structure. We also study the stability of the ACKÏ structure under some natural Banach space theory operations. As a consequence, we discover many new examples of spaces Y such that the Bishop-Phelps-Bollobás property for Asplund operators is valid for all pairs of the form (X,Y).
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Bernardo Cascales, Antonio J. Guirao, Vladimir Kadets, Mariia Soloviova,