Cyclotomic Eisenstein conjecture for S-arithmetic homology

Let TT be a finite set of primes with T=d|T|=d, let K[1/T]K[1/T] denote the corresponding SS-arithmetic level, and let F\mathcal{F} be the coefficient system used in the paper. Cyclotomic Eisenstein conjecture. Then Hi(K[1/T],F)H_i(K[1/T],\mathcal{F}) is cyclotomic Eisenstein for every idi\leq d. The conjecture is a refined form of the low-degree Eisenstein-homology principle and would force the localized spectral sequence at a non-Eisenstein ideal to converge to zero in the range p+qdp+q\leq d.

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Primary source

Frank Calegari and Akshay Venkatesh, “A torsion Jacquet–Langlands correspondence”, arXiv:1212.3847 (2012).

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