Geometric Bogomolov conjecture for abelian varieties

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Let KK be a function field with algebraic closure K‾\overline{K}, let AA be an abelian variety over K‾\overline{K}, and let XX be a closed subvariety of AA. Say that XX has dense small points if, for an even ample line bundle LL on AA, the set X(ϵ;L)X(\epsilon;L) is dense in XX for every ϵ>0\epsilon>0. Say that XX is special if there exist an abelian subvariety GG of AA, a torsion point τ∈A(K‾)tor\tau\in A(\overline{K})_{tor}, and a closed subvariety Y~⊂A~K‾/k\widetilde{Y}\subset\widetilde{A}^{\overline{K}/k} such that

X=Tr⁡A(Y~⊗kK‾)+G+τ.X=\operatorname{Tr}_A\left(\widetilde{Y}\otimes_k\overline{K}\right)+G+\tau.

Geometric Bogomolov conjecture. If XX has dense small points, then XX should be special.

This is the function-field analogue of the Bogomolov conjecture for curves, with special subvarieties replacing torsion subvarieties. The supplied text does not state a resolution status.

References

Primary source

Kazuhiko Yamaki, “Survey on the geometric Bogomolov conjecture”, arXiv:1603.09083 (2017).

Additional references

5 papers in this index state this conjecture (2010–2016). The statement above is taken from the most recent of them; the others are arXiv:1506.00708, arXiv:1405.0896, arXiv:1211.0406, arXiv:1007.1081.

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