Free pluriharmonic majorants and noncommutative interpolation

Details Free pluriharmonic majorants and noncommutative interpolation Free pluriharmonic majorants and noncommutative interpolation

2007-12-17

arxiv.org/abs/0712.2742v1

Mathematics

Functional Analysis

35 pages

Scientific paper

In this paper, we initiate the study of sub-pluriharmonic curves in Cuntz-Toeplitz algebras and free pluriharmonic majorants on noncommutative balls. We are lead to a characterization of the noncommutative Hardy space $H^2_{\bf ball}$ in terms of free pluriharmonic majorants, and to a Schur type description of the unit ball of $H^2_{\bf ball}$. These results are used to solve a multivariable commutant lifting problem and provide a description of all solutions.

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