English

Weak type $(2,H)$ and weak cotype $(2,H)$ of operator spaces

Functional Analysis 2007-07-02 v3 Operator Algebras

Abstract

Recently an operator space version of type and cotype, namely type (p,H)(p,H) and cotype (q,H)(q,H) of operator spaces for 1p2q1\leq p \leq 2\leq q \leq \infty and a subquadratic and homogeneous Hilbetian operator space HH were introduced and investigated by the author. In this paper we define weak type (2,H)(2,H) (resp. weak cotype (2,H)(2,H)) of operator spaces, which lies strictly between type (2,H)(2,H) (resp. cotype (2,H)(2,H)) and type (p,H)(p,H) for all 1p<21\leq p <2 (resp. cotype (q,H)(q,H) for all 2<q2<q \leq \infty). This is an analogue of weak type 2 and weak cotype 2 in the Banach space case, so we develop analogous equivalent formulations. We also consider weak-HH space, spaces with weak type (2,H)(2,H) and weak cotype (2,H)(2,H^*) simultaneously and establish corresponding equivalent formulations.

Keywords

Cite

@article{arxiv.math/0502337,
  title  = {Weak type $(2,H)$ and weak cotype $(2,H)$ of operator spaces},
  author = {Hun Hee Lee},
  journal= {arXiv preprint arXiv:math/0502337},
  year   = {2007}
}

Comments

22 pages, Definition is broadened, and eigen value estimation for weak $H$-space has been added. Tsirelson type construction is removed

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