English

Daugavet points and $\Delta$-points in Lipschitz-free spaces

Functional Analysis 2021-01-13 v2

Abstract

We study Daugavet points and Δ\Delta-points in Lipschitz-free Banach spaces. We prove that, if MM is a compact metric space, then μSF(M)\mu\in S_{\mathcal F(M)} is a Daugavet point if, and only if, there is no denting point of BF(M)B_{\mathcal F(M)} at distance strictly smaller than two from μ\mu. Moreover, we prove that if xx and yy are connectable by rectifiable curves of lenght as close to d(x,y)d(x,y) as we wish, then the molecule mx,ym_{x,y} is a Δ\Delta-point. Some conditions on MM which guarantee that the previous implication reverses are also obtained. As a consequence of our work, we show that Lipschitz-free spaces are natural examples of Banach spaces where we can guarantee the existence of Δ\Delta-points which are not Daugavet points.

Cite

@article{arxiv.2010.09357,
  title  = {Daugavet points and $\Delta$-points in Lipschitz-free spaces},
  author = {Mingu Jung and Abraham Rueda Zoca},
  journal= {arXiv preprint arXiv:2010.09357},
  year   = {2021}
}

Comments

19 pages

R2 v1 2026-06-23T19:26:46.691Z