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An operator-valued multi-variable Poisson type integral is studied. In Section 2 we obtain a new equivalent condition for the existence of a so-called regular unitary dilation of an n-tuple T=(T₁,...,Tₙ) of commuting contractions. Our development in Section 2 also contains a new proof of the classical dilation result of S. Brehmer, B. Sz.-Nagy and I. Halperin. In Section 3 we turn to the boundary behavior of this operator-valued Poisson integral. The results obtained in this section improve upon an earlier result proved by R. E. Curto and F.-H. Vasilescu in [3].
Anders Olofsson. "Operator-valued n-harmonic measure in the polydisc." Studia Mathematica 163.3 (2004): 203-216. <http://eudml.org/doc/286288>.
@article{AndersOlofsson2004, abstract = {An operator-valued multi-variable Poisson type integral is studied. In Section 2 we obtain a new equivalent condition for the existence of a so-called regular unitary dilation of an n-tuple T=(T₁,...,Tₙ) of commuting contractions. Our development in Section 2 also contains a new proof of the classical dilation result of S. Brehmer, B. Sz.-Nagy and I. Halperin. In Section 3 we turn to the boundary behavior of this operator-valued Poisson integral. The results obtained in this section improve upon an earlier result proved by R. E. Curto and F.-H. Vasilescu in [3].}, author = {Anders Olofsson}, journal = {Studia Mathematica}, keywords = {-harmonic Poisson integral; von Neumann inequality; regular unitary dilation}, language = {eng}, number = {3}, pages = {203-216}, title = {Operator-valued n-harmonic measure in the polydisc}, url = {http://eudml.org/doc/286288}, volume = {163}, year = {2004}, }
TY - JOUR AU - Anders Olofsson TI - Operator-valued n-harmonic measure in the polydisc JO - Studia Mathematica PY - 2004 VL - 163 IS - 3 SP - 203 EP - 216 AB - An operator-valued multi-variable Poisson type integral is studied. In Section 2 we obtain a new equivalent condition for the existence of a so-called regular unitary dilation of an n-tuple T=(T₁,...,Tₙ) of commuting contractions. Our development in Section 2 also contains a new proof of the classical dilation result of S. Brehmer, B. Sz.-Nagy and I. Halperin. In Section 3 we turn to the boundary behavior of this operator-valued Poisson integral. The results obtained in this section improve upon an earlier result proved by R. E. Curto and F.-H. Vasilescu in [3]. LA - eng KW - -harmonic Poisson integral; von Neumann inequality; regular unitary dilation UR - http://eudml.org/doc/286288 ER -