Campana–Corvaja–Zannier conjecture on the weak-Hilbert property

Let XX be a smooth proper geometrically connected variety over a finitely generated field kk of characteristic zero. Campana–Corvaja–Zannier conjecture. The following are equivalent:

  1. There is a finite field extension L/kL/k such that XLX_L has the weak-Hilbert property over LL.
  2. There is a finite field extension M/kM/k such that X(M)X(M) is dense in XX.
  3. The smooth proper connected variety XkX_{\overline{k}} is special in the sense of Campana.

This conjecture relates the weak-Hilbert property and potential density of rational points to Campana's notion of specialness. The supplied context says that the weak-Hilbert property is conjectured whenever the obvious necessary conditions hold, while the precise status is not given.

Sources & referencesView supporting material

Primary source

Pietro Corvaja, Julian Lawrence Demeio, Ariyan Javanpeykar, Davide Lombardo and Umberto Zannier, “On the distribution of rational points on ramified covers of abelian varieties”, arXiv:2011.12840 (2022).

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