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arXiv math/0312001math.OAmath.QA
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序单位量子Gromov-Hausdorff距离

Order-unit quantum Gromov-Hausdorff distance

Hanfeng Li

摘要:

在紧致量子度量空间之间引入了一个新的距离dist_oq。证明了dist_oq与Rieffel距离dist_q是Lipschitz等价的,并给出了紧致量子度量空间的参数化族关于dist_oq连续的判别准则.作为应用,我们证明了由固定紧群的遍历作用引起的量子度量空间的参数族的连续性是由作用的重数决定的,推广了Rieffel关于半单紧连通李群的非交换环面和积分余伴轨道的工作;我们还证明了Connes和Landi的θ-变形在参数θ中是连续的.

英文摘要:

We introduce a new distance dist_oq between compact quantum metric spaces. We show that dist_oq is Lipschitz equivalent to Rieffel's distance dist_q, and give criteria for when a parameterized family of compact quantum metric spaces is continuous with respect to dist_oq. As applications, we show that the continuity of a parameterized family of quantum metric spaces induced by ergodic actions of a fixed compact group is determined by the multiplicities of the actions, generalizing Rieffel's work on noncommutative tori and integral coadjoint orbits of semisimple compact connected Lie groups; we also show that the theta-deformations of Connes and Landi are continuous in the parameter theta.

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