Daws's cotype conjecture for coefficient spaces

Let Γ\Gamma be a discrete group, let 1p21\leq p\leq 2, and let qq be its conjugate exponent, so that

1p+1q=1.\frac{1}{p}+\frac{1}{q}=1.

Let Bp(Γ)B_p(\Gamma) denote the coefficient space associated with isometric representations on qq-spaces. Daws's cotype conjecture. The Banach space Bp(Γ)B_p(\Gamma) has cotype qq. This conjecture would supply the cotype step needed to deduce T1(Γ)q(Γ)T_1(\Gamma)\subseteq\ell^q(\Gamma) from the preceding coefficient-space inclusion. It is attributed in the paper to Daws and is presented as an unresolved conjecture.

Sources & referencesView supporting material

Primary source

Maria Gerasimova and Andreas Thom, “On the isometrisability of group actions on p-spaces”, arXiv:1901.07496 (2020).

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