Exactness of reduced amalgamated free product C*-algebras

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Some completely positive maps on reduced amalgamated free products of C*-algebras are constructed; these allow a proof that the class of exact unital C*-algebras is closed under taking reduced amalgamated free products. Consequently, the class of exact discrete groups is closed under taking amalgamated free products.
21 pages

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Operator Algebras, 46L05; 46L35

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http://salesiana.dossiersoluciones.com/handle/123456789/79323

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/9911001
 http://arxiv.org/abs/math/9911001

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arXiv