The amalgamated free product of hyperfinite von Neumann algebras over finite dimensional subalgebras

The amalgamated free product of hyperfinite von Neumann algebras over finite dimensional subalgebras
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有限维子代数上的超有限冯诺依曼代数的合并自由积

DOI:
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
D. Redelmeier
D. Redelmeier
中科院分区:
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文献类型:
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作者:
K. Dykema;D. Redelmeier

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在本文中,我们描述了有限维子代数上两个超有限冯诺依曼代数的合并自由积。一般来说,自由乘积是内插自由群因子和超有限冯诺依曼代数的有限直和。然后我们证明这种形式的冯·诺依曼代数类在有限维子代数上采用合并自由积时是封闭的。
In this paper we describe the amalgamated free product of two hyperfinite von Neumann algebras over a finite dimensional subalgebra. In general the free product is a finite direct sum of interpolated free group factors and a hyperfinite von Neumann algebra. We then show that the class of von Neumann algebras of this form is closed under taking amalgamated free products over finite dimensional subalgebras.