Representations of Hardy Algebras: Absolute Continuity, Intertwiners, and Superharmonic Operators

Representations of Hardy Algebras: Absolute Continuity, Intertwiners, and Superharmonic Operators
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哈代代数的表示:绝对连续性、交织子和超调和算子

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发表时间:
2010
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通讯作者:
B. Solel
B. Solel
中科院分区:
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文献类型:
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作者:
P. Muhly;B. Solel

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设$${mathcal{T}_{+}(E)}$$是W*-对应E的张量代数,H∞(E)是相应的Hardy代数。我们研究了将希尔伯特空间上的$${数学{T}_(+)}$$的完全压缩表示推广到同一希尔伯特空间上的H-∞(E)的超弱连续完全压缩表示的问题。我们的工作推广了经典的Sz.-Nagy-FOIAş泛函演算,以及Davidson,Li和Pitts最近关于Popescu非对易圆盘代数的表示理论的工作。
Suppose $${mathcal{T}_{+}(E)}$$ is the tensor algebra of a W*-correspondence E and H∞(E) is the associated Hardy algebra. We investigate the problem of extending completely contractive representations of $${mathcal{T}_{+}(E)}$$ on a Hilbert space to ultra-weakly continuous completely contractive representations of H∞(E) on the same Hilbert space. Our work extends the classical Sz.-Nagy–Foiaş functional calculus and more recent work by Davidson, Li and Pitts on the representation theory of Popescu’s noncommutative disc algebra.