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math.FA2003
Entropy and multivariable interpolation
Gelu Popescu
We define a new notion of entropy for operators on Fock spaces and positive definite multi-Toeplitz kernels on free semigroups. This is studied in connection with factorization the…
math.FA2003
Commutator lifting inequalities and interpolation
Gelu Popescu
In this paper we obtain a multivariable commutator lifting inequality, which extends to several variables a recent result of Foias, Frazho, and Kaashoek. The inequality yields a mu…