Conjecture on density of the typical Hodge locus

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.

Sources & referencesView supporting material

Primary source

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

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