Pink's intersection conjecture for semi-abelian varieties

Let GG be a complex semi-abelian variety, and let XX be a closed irreducible subvariety of GG of dimension dd. Write G[d+1]G^{[d+1]} for the union of the algebraic subgroups of GG of codimension at least d+1d+1.

Pink's conjecture. If XX is not contained in a proper algebraic subgroup of GG, then

XG[d+1]X\cap G^{[d+1]}

is not Zariski dense in XX.

This is a natural generalization of the theorem of Maurin and extends the Manin–Mumford setting from torsion points to intersections with algebraic subgroups of sufficiently large codimension. The statement is presented as a conjecture of Pink and remains open in this generality.

Sources & referencesView supporting material

Primary source

Antoine Chambert-Loir, “Relations de dépendance et intersections exceptionnelles (Dependence relations and exceptional intersections)”, arXiv:1101.4738 (2011).

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