Non-abelian Leopoldt dimension conjecture for ordinary cohomology

Let ΛE\Lambda_E be the regular local ordinary weight algebra of dimension r=rkTr=\operatorname{rk}\mathrm T, let FmF_{\mathfrak m}^{\bullet} be the complex interpolating the localized ordinary cohomology, and let l0l_0 be the defect of G\mathrm G. Non-abelian Leopoldt dimension conjecture. The cohomology of this complex has Krull dimension

dimΛEH(Fm)=rl0.\dim_{\Lambda_E}H^*(F_{\mathfrak m}^{\bullet})=r-l_0.

This is presented as a higher, non-abelian analogue of Leopoldt's conjecture and is related to a separate Galois-theoretic dimension conjecture. Its validity is used to control the derived Hecke action.

Sources & referencesView supporting material

Primary source

Chandrashekhar Khare and Niccolò Ronchetti, “Derived Hecke action at p and the ordinary p-adic cohomology of arithmetic manifolds”, arXiv:2004.06241 (2020).

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