Radial multipliers on reduced free products of operator algebras

Details Radial multipliers on reduced free products of operator algebras Radial multipliers on reduced free products of operator algebras

2012-01-03

arxiv.org/abs/1201.0609v2

Mathematics

Operator Algebras

20 pages; corrected title

Scientific paper

Let A_i be a family of unital C*-algebras, respectively, of von Neumann algebras and phi: N_0 \to C. We show that if a Hankel matrix related to phi is trace-class, then there exists a unique completely bounded map M_phi on the reduced free product of the A_i, which acts as an radial multiplier. Hereby we generalize a result of Wysocza\'nski for Herz-Schur multipliers on reduced group C*-algebras for free products of groups.

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