Operator-valued dyadic BMO spaces

Details Operator-valued dyadic BMO spaces Operator-valued dyadic BMO spaces

2008-05-01

arxiv.org/abs/0805.0158v1

Mathematics

Functional Analysis

to appear in J. Operator Theory

Scientific paper

We consider BMO spaces of operator-valued functions, among them the space of operator-valued functions $B$ which define a bounded paraproduct on $L^2(H)$. We obtain several equivalent formulations of $\|\pi_B\|$ in terms of the norm of the "sweep" function of $B$ or of averages of the norms of martingales transforms of $B$ in related spaces. Furthermore, we investigate a connection between John-Nirenberg type inequalities and Carleson-type inequalities via a product formula for paraproducts and deduce sharp dimensional estimates for John-Nirenberg type inequalities.

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