English

Approximate identities for Ideals in $L(L^p))$

Functional Analysis 2024-02-22 v1

Abstract

The main result is that the only non trivial closed ideal in the Banach algebra L(Lp)L(L^p) of bounded linear operators on Lp(0,1)L^p(0,1), 1p<1\le p < \infty, that has a left approximate identity is the ideal of compact operators. The algebra L(L1)L(L^1) has at least one non trivial closed ideal that has a contractive right approximate identity as well as many, including the unique maximal ideal, that do not have a right approximate identity.

Keywords

Cite

@article{arxiv.2402.13438,
  title  = {Approximate identities for Ideals in $L(L^p))$},
  author = {William B. Johnson and Gideon Schechtman},
  journal= {arXiv preprint arXiv:2402.13438},
  year   = {2024}
}
R2 v1 2026-06-28T14:55:13.396Z