Adelic Mordell–Lang conjecture for Brauer–Manin components

Let kk be a global field, let AA be an abelian variety over kk, and let XAX\subset A be a closed subvariety. Assume that AkA_{\overline{k}} has no positive-dimensional isotrivial quotient. A coset means a translate of an abelian subvariety, and write X(Ak)BrX(\mathbb A_k)^{\operatorname{Br}} for the adelic points orthogonal to the Brauer group. Adelic Mordell–Lang conjecture. There exists a finite union of cosets

Y=iCiY=\bigcup_i C_i

contained in XX such that every connected component of

X(Ak)A(Ak)BrX(\mathbb A_k)\cap A(\mathbb A_k)^{\operatorname{Br}}

contains a point of Y(Ak)Y(\mathbb A_k). This was suggested for coset-free XX over number fields, while the stated global-field formulation remains an open problem in the supplied source.

Sources & referencesView supporting material

Primary source

Brendan Creutz, “Adelic Mordell-Lang and the Brauer-Manin obstruction”, arXiv:2510.25931 (2025).

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