How can we recover Baire class one functions?

Details How can we recover Baire class one functions? How can we recover Baire class one functions?

2007-09-30

arxiv.org/abs/0710.0155v1

Mathematika 50 (2003) 171-198

Mathematics

Logic

Scientific paper

Let X and Y be separable metrizable spaces, and f:X-->Y be a function. We want to recover f from its values on a small set via a simple algorithm. We show that this is possible if f is Baire class one, and in fact we get a characterization. This leads us to the study of sets of Baire class one functions and to a characterization of the separability of the dual space of an arbitrary Banach space.

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