The Bishop-Phelps-Bollob\'as property on the space of $c_0$-sum

TL;DR

This paper investigates the Bishop-Phelps-Bollobás property on $c_0$-sums of Banach spaces, establishing new conditions under which this property holds for operators and bilinear forms, extending previous results.

Contribution

It extends the BPBp to $c_0$-sums of Banach spaces with uniform convexity and smoothness, covering operators and bilinear forms, and introduces local BPBp results.

Findings

$(c_0(X),Y)$ has BPBp when $X$ and $Y$ are uniformly convex

$(c_0(X),c_0(X))$ has BPBp for bilinear forms with $X$ uniformly convex and smooth

Established local BPBp results for operators and bilinear forms

Abstract

The main purpose of this paper is to study Bishop-Phelps-Bollob\'as type properties on $c_0$ sum of Banach spaces. Among other results, we show that the pair $(c_0(X),Y)$ has the Bishop-Phelps-Bollob\'as property (in short, BPBp) for operators whenever $X$ is uniformly convex and $Y$ is (complex) uniformly convex. We also prove that the pair $(c_0(X),c_0(X))$ has the BPBp for bilinear forms whenever $X$ is both uniformly convex and uniformly smooth. These extend the previously known results that $(c_0,Y)$ has the BPBp for operators whenever $Y$ is uniformly convex and $(c_0,c_0)$ has the BPBp for bilinear forms. We also obtain some results on a local BPBp which is called $\mathbf{L}_{p,p}$ for both operators and bilinear forms.