English

Daugavet points in projective tensor products

Functional Analysis 2021-02-01 v1

Abstract

In this paper, we are interested in studying when an element zz in the projective tensor product X^πYX \widehat{\otimes}_\pi Y turns out to be a Daugavet point. We prove first that, under some hypothesis, the assumption of X^πYX \widehat{\otimes}_\pi Y having the Daugavet property implies the existence of a great amount of isometries from YY into XX^*. Having this in mind, we provide methods for constructing non-trivial Daugavet points in X^πYX \widehat{\otimes}_\pi Y. We show that C(K)C(K)-spaces are examples of Banach spaces such that the set of the Daugavet points in C(K)^πYC(K) \widehat{\otimes}_\pi Y is weakly dense when YY is a subspace of C(K)C(K)^*. Finally, we present some natural results on when an elementary tensor xyx \otimes y is a Daugavet point.

Cite

@article{arxiv.2101.12518,
  title  = {Daugavet points in projective tensor products},
  author = {Sheldon Dantas and Mingu Jung and Abraham Rueda Zoca},
  journal= {arXiv preprint arXiv:2101.12518},
  year   = {2021}
}

Comments

16 pages

R2 v1 2026-06-23T22:39:08.600Z