AFD因子的有限指数自同构的近似酉等价性
Approximate Unitary Equivalence of Finite Index Endomorphisms of the AFD Factors
摘要:
我们刻画了AFD因子上的两个有限指标自同态近似酉等价的条件。利用Izumi引入的自同态的标准扩张给出了其特征。我们的结果是AFD因子的自同态的近似内性的特征的推广,由Kawahiashi-Sutherland-Takesaki和Masuda-Tomatsu得到。我们的证明,这并不取决于类型的因素,是基于最近的发展的Rohlin性能的流量冯诺依曼代数。
英文摘要:
We characterize the condition for two finite index endomorphisms on an AFD factor to be approximately unitarily equivalent. The characterization is given by using the canonical extension of endomorphisms, which is introduced by Izumi. Our result is a generalization of the characterization of approximate innerness of endomorphisms of the AFD factors, obtained by Kawahiashi--Sutherland--Takesaki and Masuda--Tomatsu. Our proof, which does not depend on the types of factors, is based on recent development on the Rohlin property of flows on von Neumann algebras.
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