English

The skew James type constant in Banach spaces

Functional Analysis 2025-04-02 v1

Abstract

In the past, Takahashi has introduced the James type constants JX,t(τ)\mathcal{J}_{\mathcal{X} ,t}(\tau). Building upon this foundation, we introduce an innovative skew James type constant, denoted as Jt[τ,X]\mathcal{J}_t[\tau,\mathcal{X}], which is perceived as a skewed counterpart to the traditional James type constants. We delineate a novel constant, and proceed to ascertain its equivalent representations along with certain attributes within the context of Banach spaces, and then an investigation into the interrelation between the skewness parameter and the modulus of convexity is conducted, after that we define another new constant Gt(X)\mathcal{G}_t(\mathcal{X}), and some conclusions were drawn.

Keywords

Cite

@article{arxiv.2504.00827,
  title  = {The skew James type constant in Banach spaces},
  author = {Zhiyong Rao and Qi Liu and Qiong Wu and Zhouping Yin and Qichuan Ni},
  journal= {arXiv preprint arXiv:2504.00827},
  year   = {2025}
}