Conjecture on density of the typical Hodge locus

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Let V{\mathbb V} be a polarizable Z\mathbb{Z}-variation of Hodge structures on a smooth connected complex quasi-projective variety SS. The typical Hodge locus HL⁡(S,V⊗)typ⁡\operatorname{HL}(S, {\mathbb V}^{\otimes})_{\operatorname{typ}} is the union of the strict typical special subvarieties of SS for V{\mathbb V}.

Density conjecture for the typical Hodge locus. If HL⁡(S,V⊗)typ⁡\operatorname{HL}(S, {\mathbb V}^{\otimes})_{\operatorname{typ}} is nonempty, then it is dense in SS for the analytic topology.

Together with the strong Zilber–Pink conjecture, this predicts a dichotomy between an algebraic Hodge locus and an analytically dense one. The source gives no resolution status.

References

Primary source

Gregorio Baldi, Bruno Klingler and Emmanuel Ullmo, “On the distribution of the Hodge locus”, arXiv:2107.08838 (2023).

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