The coarse Baum–Connes conjecture with coefficients

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Let XX be a proper metric space, let NXN_X be a locally finite net in XX, and let AA be a C∗C^*-algebra. Let Pk(NX)P_k(N_X) denote the Rips complex, and let eAe_A be the evaluation-at-zero homomorphism from the localization algebra to the Roe algebra.

Coarse Baum–Connes conjecture with coefficients. The homomorphism

eA,∗:lim⁡k→∞K∗(CL∗(Pk(NX),A))⟶lim⁡k→∞K∗(C∗(Pk(NX),A))e_{A,*}:\lim_{k\rightarrow\infty}K_*(C_L^*(P_k(N_X),A))\longrightarrow\lim_{k\rightarrow\infty}K_*(C^*(P_k(N_X),A))

is an isomorphism of abelian groups.

This is the coefficient-valued coarse assembly conjecture that underlies the paper's quantitative refinement. The source recalls it as a conjecture and uses known cases to derive the quantitative conjecture.

References

Primary source

Jianguo Zhang, “On the quantitative coarse Baum-Connes conjecture with coefficients”, arXiv:2410.11929 (2024).

Additional references

7 papers in this index state this conjecture (2013–2024). The statement above is taken from the most recent of them; the others are arXiv:2410.11662, arXiv:2311.05333, arXiv:1909.08712, arXiv:1405.4220, arXiv:1312.2857, arXiv:1308.2588.

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