Mordell–Lang conjecture for Shimura varieties

Let SS be a Shimura variety. For a subset obreakΞobreakS obreak\boldsymbol{\Xi} obreak\to S, let obreakΞˉobreak obreak\boldsymbol{\bar{\Xi}} obreak be the union in SS of the generalised Hecke orbits of the points of obreakΞ obreak\boldsymbol{\Xi}. A \subset obreakΣobreakS obreak\boldsymbol{\Sigma} obreak\to S is a structure of finite rank if obreakΣ=Ξˉobreak obreak\boldsymbol{\Sigma=\bar{\Xi}} obreak for some obreakΞobreak obreak\boldsymbol{\Xi} obreak containing only finitely many non-special points; a weakly special subvariety is obreakΣobreak obreak\boldsymbol{\Sigma} obreak-special if it contains a point of obreakΣobreak obreak\boldsymbol{\Sigma} obreak. Mordell–Lang conjecture for SS. Any subvariety VV of SS contains only finitely many maximal obreakΣobreak obreak\boldsymbol{\Sigma} obreak-special subvarieties. This is the Shimura-variety analogue of Mordell–Lang and is stated alongside an equivalent formulation in terms of Zariski closures of subsets of obreakΣobreak obreak\boldsymbol{\Sigma} obreak; no resolution is supplied in the source.

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Primary source

Vahagn Aslanyan and Christopher Daw, “A note on unlikely intersections in Shimura varieties”, arXiv:2209.07967 (2024).

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