Geodesic
Cowling–Haagerup constant of the product of discrete quantum groups
Documenta mathematica, Tome 29 (2024) no. 6, pp. 1499-1518

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We show that (central) Cowling–Haagerup constant of discrete quantum groups is multiplicative Λcb​(Γ1​×Γ2​)=Λcb​(Γ1​)Λcb​(Γ2​), which extends the result of Freslon (2015) to general (not necessarily unimodular) discrete quantum groups. The crucial feature of our approach is considering algebras C(Γ^),L∞(Γ^) as operator modules over L1(Γ^).
DOI : 10.4171/dm/979
Classification : 46L67, 22D55, 47L25
Mots-clés : weak amenability, discrete quantum group 
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     title = {Cowling{\textendash}Haagerup constant of the product of discrete quantum groups},
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Jacek Krajczok. Cowling–Haagerup constant of the product of discrete quantum groups. Documenta mathematica, Tome 29 (2024) no. 6, pp. 1499-1518. doi: 10.4171/dm/979

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