The Role of Nonpolynomiality in Uniform Approximation by RBF Networks of Hankel Translates

Author:

Marrero Isabel1ORCID

Affiliation:

1. Departamento de Análisis Matemático, Universidad de La Laguna, Aptdo. 456, 38200 La Laguna, Tenerife, Spain

Abstract

Givenμ>-1/2andcI=]0,[, let the spaceCμ,c(respectively,Cμ) consist of all those continuous functionsuon]0,c](respectively,I) such that the limitlimz0+z-μ-1/2u(z)exists and is finite;Cμ,cis endowed with the uniform normuμ,,c=supz[0,c]z-μ-1/2u(z)(uCμ,c).AssumeϕCμdefines an absolutely regular Hankel-transformable distribution. Then, the linear span of dilates and Hankel translates ofϕis dense inCμ,cfor allcIif, and only if,ϕπμ, whereπμ=span{t2n+μ+1/2:nZ+}.

Publisher

Hindawi Limited

Subject

Analysis

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