Representation of free Herglotz functions

Representation of free Herglotz functions
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自由 Herglotz 函数的表示

DOI:
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发表时间:
2016
影响因子:
1.1
通讯作者:
R. Tully
R. Tully
中科院分区:
数学3区
文献类型:
--
作者:
J. Pascoe;Benjamin Passer;R. Tully

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Herglotz函数是从开放复单位盘到封闭复右半平面的全纯映射。经典赫罗兹函数在单位圆上对正测度有一个积分表示。在精确的$C^*$-代数上证明了Herglotz表示的自由解析类似,并描述了我们的表示如何专门化到自由概率情况。我们还证明了,不管$C^*$-代数如何,可表示的赫格罗兹函数集合在自然拓扑中一定是封闭的。
A Herglotz function is a holomorphic map from the open complex unit disk into the closed complex right halfplane. A classical Herglotz function has an integral representation against a positive measure on the unit circle. We prove a free analytic analogue of the Herglotz representation over exact $C^*$-algebras, and describe how our representations specialize to the free probabilistic case. We also show that, regardless of the $C^*$-algebra, the set of representable Herglotz functions must be closed in a natural topology.