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On the stability index for weighted composition operators

Abstract: Let ? > 0. A continuous linear operator T : C(X) ?? C(Y ) is said to ?-preserve disjointness if ?(T f )(T g)?? ? ?, whenever f, g ? C(X) satisfy ? f ?? = ?g?? = 1 and f g ? 0. In this paper we continue our study of the minimal interval where the possible maximal distance from a norm one operator which ?-preserves disjointness to the set of weighted composition maps may lie. We provide sharp bounds for both the finite and the infinite case, which turn out to be completely different

 Authorship: Araujo J., Font J.,

 Fuente: Journal of Approximation Theory, 2010, 162(12), 2136-2148

 Publisher: Elsevier

 Year of publication: 2010

 No. of pages: 13

 Publication type: Article

 DOI: 10.1016/j.jat.2010.06.006

 ISSN: 0021-9045,1096-0430

 Spanish project: MTM2006-14786

 Publication Url: https://doi.org/10.1016/j.jat.2010.06.006

Authorship

FONT, JUAN J.