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arXiv 0911.3073math.OAmath.QA
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不动点子因子的平面代数

The planar algebra of a fixed point subfactor

Teodor Banica

摘要:

考虑$(P\otimes A)^G\subset(P\otimes B)^G$型包含,其中$G$是Kac型紧量子群,作用于${\rm II}_1$因子$P$和有限维$C^*$ -代数$A\subset B$的Markov包含.在$[A,B]=0$的情况下,它基本上涵盖了所有已知的例子,我们表明,这样一个子因子的平面代数的形式是$P(A\subset B)^G$,与$G$作用在一些自然的意义上的二分图代数$P(A\subset B)$。

英文摘要:

We consider inclusions of type $(P\otimes A)^G\subset(P\otimes B)^G$, where $G$ is a compact quantum group of Kac type acting on a ${\rm II}_1$ factor $P$, and on a Markov inclusion of finite dimensional $C^*$-algebras $A\subset B$. In the case $[A,B]=0$, which basically covers all known examples, we show that the planar algebra of such a subfactor is of the form $P(A\subset B)^G$, with $G$ acting in some natural sense on the bipartite graph algebra $P(A\subset B)$.

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