The coarse geometric ℓp\ell^p-Novikov conjecture

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Let Γ\Gamma be a discrete metric space with bounded geometry. For p∈(1,∞)p\in(1,\infty), let Bp(Γ)B^p(\Gamma) be its ℓp\ell^p-Roe algebra and BLp(Γ)B_L^p(\Gamma) its ℓp\ell^p-localization algebra. For the Rips complex Pd(Γ)P_d(\Gamma) at scale dd, the evaluation homomorphism e:BLp(Pd(Γ))→Bp(Pd(Γ))e:B_L^p(P_d(\Gamma))\to B^p(P_d(\Gamma)) induces the index map

e∗:lim⁡d→∞K∗(BLp(Pd(Γ)))→lim⁡d→∞K∗(Bp(Pd(Γ)))≅K∗(Bp(Γ)).e_*: \lim_{d\to\infty} K_*(B_L^p(P_d(\Gamma))) \to \lim_{d\to\infty} K_*(B^p(P_d(\Gamma)))\cong K_*(B^p(\Gamma)).

The coarse geometric ℓp\ell^p-Novikov conjecture. If Γ\Gamma is a discrete metric space with bounded geometry, then the index map e∗e_* is injective.

This is the coarse geometric ℓp\ell^p-Novikov conjecture, an ℓp\ell^p analogue of the coarse Novikov conjecture. The paper proves it for metric spaces with bounded geometry that admit a coarse embedding into a simply connected complete Riemannian manifold of nonpositive sectional curvature; the general assertion remains open.

References

Primary source

Lin Shan and Qin Wang, “The Coarse Geometric ^p-Novikov Conjecture for Subspaces of Non-positively Curved Manifolds”, arXiv:1910.01766 (2020).

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