Abstract
We prove that weak amenability of a locally compact group imposes a strong condition on its amenable closed normal subgroups. This extends non–weak amenability results of Haagerup (1988) and Ozawa and Popa (2010). A von Neumann algebra analogue is also obtained.
Citation
Narutaka Ozawa. "Examples of groups which are not weakly amenable." Kyoto J. Math. 52 (2) 333 - 344, Summer 2012. https://doi.org/10.1215/21562261-1550985
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