The potential weak Hilbert property conjecture for special varieties

Let KK be a finitely generated field and let XX be a smooth projective variety over KK. The variety XX has potential WHP if XLX_L has the weak Hilbert property for some finite extension L/KL/K. Potential weak Hilbert property conjecture. The following are equivalent:

(i)X has potential WHP;(ii)there is a finite field extension L/K such that X(L) is Zariski-dense in X;(iii)X is special.\begin{array}{ll} \text{(i)} & X\text{ has potential WHP};\\ \text{(ii)} & \text{there is a finite field extension }L/K\text{ such that }X(L)\text{ is Zariski-dense in }X;\\ \text{(iii)} & X\text{ is special}. \end{array}

This combines the expected characterization of potential WHP by potential density with Campana's prediction that special varieties are the varieties with the opposing arithmetic behavior to varieties of general type.

Sources & referencesView supporting material

Primary source

Arno Fehm and Ariyan Javanpeykar, “Hilbert properties of varieties”, arXiv:2511.18431 (2025).

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