Kebekus–Kovács hyperbolicity conjecture I

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Let fU:U→Vf_U:U\to V be a smooth projective family whose general fiber admits a good minimal model. Write Var⁡(fU)\operatorname{Var}(f_U) for the variation of the family. Kebekus–Kovács hyperbolicity conjecture I. Either

κ(V)=−∞andVar⁡(fU)<dim⁡V,\kappa(V)=-\infty\quad\text{and}\quad \operatorname{Var}(f_U)<\dim V,

or

κ(V)≥0andVar⁡(fU)≤κ(V).\kappa(V)\geq 0\quad\text{and}\quad \operatorname{Var}(f_U)\leq\kappa(V).

The conjecture extends the Viehweg hyperbolicity conjecture beyond maximal variation and was proved for bases of dimension at most five in the paper; the source does not otherwise establish its general status.

References

Primary source

Behrouz Taji, “On the Kodaira dimension of base spaces of families of manifolds”, arXiv:1809.05616 (2021).

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