English

There is no operatorwise version of the Bishop-Phelps-Bollob\'as property

Functional Analysis 2019-02-05 v1

Abstract

Given two real Banach spaces XX and YY with dimensions greater than one, it is shown that there is a sequence {Tn}nN\{T_n\}_{n\in \mathbb{N}} of norm attaining norm-one operators from XX to YY and a point x0Xx_0\in X with x0=1\|x_0\|=1, such that Tn(x0)1\|T_n(x_0)\|\longrightarrow 1 but infnN{\mboxdist(x0,{xX:Tn(x)=x=1})}>0.\inf_{n \in \mathbb{N}} \{\mbox{dist} (x_0,\,\{x\in X: \|T_n(x)\|=\|x\|=1\})\} >0. This shows that a version of the Bishop-Phelps-Bollob\'as property in which the operator is not changed is possible only if one of the involved Banach spaces is one-dimensional.

Keywords

Cite

@article{arxiv.1810.00684,
  title  = {There is no operatorwise version of the Bishop-Phelps-Bollob\'as property},
  author = {Sheldon Dantas and Vladimir Kadets and Sun Kwang Kim and Han Ju Lee and Miguel Martín},
  journal= {arXiv preprint arXiv:1810.00684},
  year   = {2019}
}

Comments

The content of this paper overlaps with the old version of arXiv:1709.00032 (arXiv:1709.00032v1, submitted on 31 Aug 2017). Nevertheless, there is no intersection between the present version and the updated one of arXiv:1709.00032 (arXiv:1709.00032v2, submitted on 26 Sep 2018)