Geodesic
Higher l 2-Betti Numbers of Universal Quantum Groups
Canadian mathematical bulletin, Tome 61 (2018) no. 2, pp. 225-235

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DOI

We calculate all ${{\ell }^{2}}$ -Betti numbers of the universal discrete Kac quantum groups $\widehat{\text{U}}_{n}^{+}$ as well as their half-liberated counterparts $\widehat{\text{U}}_{n}^{*}$ .
DOI : 10.4153/CMB-2017-036-3
Mots-clés : 16T05, 46L65, 20G42, l 2-Betti number, free unitary quantum group, half-liberated unitary quantum group, free product formula, extension 
Bichon, Julien; Kyed, David; Raum, Sven. Higher l 2-Betti Numbers of Universal Quantum Groups. Canadian mathematical bulletin, Tome 61 (2018) no. 2, pp. 225-235. doi: 10.4153/CMB-2017-036-3
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     author = {Bichon, Julien and Kyed, David and Raum, Sven},
     title = {Higher l {2-Betti} {Numbers} of {Universal} {Quantum} {Groups}},
     journal = {Canadian mathematical bulletin},
     pages = {225--235},
     year = {2018},
     volume = {61},
     number = {2},
     doi = {10.4153/CMB-2017-036-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2017-036-3/}
}
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