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Quotients of Banach spaces with the Daugavet property

Functional Analysis 2015-07-16 v1

Abstract

We consider a general concept of Daugavet property with respect to a norming subspace. This concept covers both the usual Daugavet property and its weak^* analogue. We introduce and study analogues for narrow operators and rich subspaces in this general setting and apply the results to show that a quotient of L1[0,1]L_1[0,1] over an 1\ell_1-subspace can fail the Daugavet property. The latter answers a question posed to us by A. Pelczynski in the negative.

Keywords

Cite

@article{arxiv.0806.1815,
  title  = {Quotients of Banach spaces with the Daugavet property},
  author = {Vladimir Kadets and Varvara Shepelska and Dirk Werner},
  journal= {arXiv preprint arXiv:0806.1815},
  year   = {2015}
}

Comments

15 pages