Geodesic
Weak amenability of free products of hyperbolic and amenable groups
Glasgow mathematical journal, Tome 64 (2022) no. 3, pp. 698-701

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DOI

We show that if G is an amenable group and H is a hyperbolic group, then the free product $G\ast H$ is weakly amenable. A key ingredient in the proof is the fact that $G\ast H$ is orbit equivalent to $\mathbb{Z}\ast H$.
DOI : 10.1017/S0017089521000458
Mots-clés : Weak amenability, free products, orbit equivalence 
Vergara, Ignacio. Weak amenability of free products of hyperbolic and amenable groups. Glasgow mathematical journal, Tome 64 (2022) no. 3, pp. 698-701. doi: 10.1017/S0017089521000458
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     title = {Weak amenability of free products of hyperbolic and amenable groups},
     journal = {Glasgow mathematical journal},
     pages = {698--701},
     year = {2022},
     volume = {64},
     number = {3},
     doi = {10.1017/S0017089521000458},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089521000458/}
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