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arXiv 0901.02882009-01-15math.OA

酉矩矩阵

Matrices of unitary moments

Ken Dykema, Kate Juschenko

备注：: 12 pages. In the revision (to version 2) we add some citations to earlier results on extreme correlation matrices that include some results we use

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摘要：

我们调查某些矩阵组成的混合，二阶矩的酉。酉是从具有关于迹的矩的C* 代数中得到的，或者，从具有通常迹的矩阵代数中得到的。根据E. Kirchberg关于Connes的嵌入问题。

英文摘要：

We investigate certain matrices composed of mixed, second-order moments of unitaries. The unitaries are taken from C*-algebras with moments taken with respect to traces, or, alternatively, from matrix algebras with the usual trace. These sets are of interest in light of a theorem of E. Kirchberg about Connes' embedding problem.

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