Approximation of *weak-to-norm continuous mappings

Details Approximation of *weak-to-norm continuous mappings Approximation of *weak-to-norm continuous mappings

2000-07-20

arxiv.org/abs/math/0007124v1

J. Approx. Theory 119 (2002), 18-40

Mathematics

Functional Analysis

13 pages

Scientific paper

10.1006/jath.2002.3708

The purpose of this paper is to study the approximation of vector valued mappings defined on a subset of a normed space. We investigate Korovkin-type conditions under which a given sequence of linear operators becomes a so-called approximation process. First, we give a sufficient condition for this sequence to approximate the class of bounded, uniformly continuous functions. Then we present some sufficient and necessary conditions guaranteeing the approximation within the class of unbounded, *weak-to-norm continuous mappings. We also derive some estimates of the rate of convergence.

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