The Coates--Sujatha module conjecture for false Tate curve extensions

Let pp be an odd prime, let F=Q(μp,mpn:n1)F_\infty=\mathbb{Q}(\mu_{p^\infty},\sqrt[p^n]{m}:n\geq1), let G=Gal(F/Q)G=\operatorname{Gal}(F_\infty/\mathbb{Q}), and let H=Gal(F/Qcyc)H=\operatorname{Gal}(F_\infty/\mathbb{Q}^{\mathrm{cyc}}). Define MH(G)\mathfrak M_H(G) to be the category of finitely generated Λ(G)\Lambda(G)-modules MM for which M/M[p]M/M[p^\infty] is finitely generated over Λ(H)\Lambda(H). Let X(E/F)X(E/F_\infty) be the Pontryagin dual of the pp^\infty-Selmer group. Coates--Sujatha module conjecture.

X(E/F)MH(G).X(E/F_\infty)\in\mathfrak M_H(G).

This strengthens mere Λ(G)\Lambda(G)-torsionness and is a structural conjecture in non-commutative Iwasawa theory. The source gives the statement in an appendix but does not report a resolution.

Sources & referencesView supporting material

Primary source

Tim Dokchitser and Vladimir Dokchitser, “Computations in non-commutative Iwasawa theory”, arXiv:math/0509286 (2005).

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