Quantum isometry groups of 0-dimensional manifolds

Bhowmick, Jyotishman ; Goswami, Debashish ; Skalski, Adam (2011) Quantum isometry groups of 0-dimensional manifolds Transactions of the American Mathematical Society, 363 . pp. 901-921. ISSN 0002-9947

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Official URL: http://www.ams.org/journals/tran/2011-363-02/S0002...

Related URL: http://dx.doi.org/10.1090/S0002-9947-2010-05141-4


Quantum isometry groups of spectral triples associated with approximately finite-dimensional C*-algebras are shown to arise as inductive limits of quantum symmetry groups of corresponding truncated Bratteli diagrams. This is used to determine explicitly the quantum isometry group of the natural spectral triple on the algebra of continuous functions on the middle-third Cantor set. It is also shown that the quantum symmetry groups of finite graphs or metric spaces coincide with the quantum isometry groups of the corresponding classical objects equipped with natural Laplacians.

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