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DIANA CAPONETTI

Optimal retraction problem for proper $k$-ball-contractive mappings in $C^m [0,1]$

  • Authors: Caponetti, Diana; Trombetta, Alessandro; Trombetta, Giulio
  • Publication year: 2019
  • Type: Articolo in rivista (Articolo in rivista)
  • OA Link: http://hdl.handle.net/10447/357794

Abstract

In this paper for any epsilon > 0 we construct a new proper k-ball-contractive retraction of the closed unit ball of the Banach space C-m[0, 1] onto its boundary with k < 1+epsilon, so that the Wosko constant W-gamma(C-m[0, 1]) is equal to 1.