Equivariant coarse Baum–Connes conjecture

Let Γ\Gamma be a countable discrete group acting properly on a proper metric space XX. Let KXΓ(X)KX_*^{\Gamma}(X) denote the universal KΓK^{\Gamma}-group assembling the equivariant indices of objects in the relevant controlled category, and let

μXΓ:KXΓ(X)K(C(X)Γ)\mu_X^{\Gamma}:KX_*^{\Gamma}(X)\to K_*(C^*(X)^{\Gamma})

be the associated assembly map. Equivariant coarse Baum–Connes conjecture. The assembly map μXΓ\mu_X^{\Gamma} is an isomorphism. Equivalently, every element of K(C(X)Γ)K_*(C^*(X)^{\Gamma}) is the index of an elliptic operator, uniquely up to equivalence in KXΓ(X).KX_*^{\Gamma}(X). Its injectivity part is the equivariant coarse Novikov conjecture.

Sources & referencesView supporting material

Primary source

Liang Guo, Qin Wang, Jianchao Wu and Guoliang Yu, “Hilbert-Hadamard spaces and the equivariant coarse Novikov conjecture”, arXiv:2411.18538 (2025).

Additional references

2 papers in this index state this conjecture (2021–2024). The statement above is taken from the most recent of them; the others are arXiv:2109.11643.

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