Hodge-theoretic Hopf conjecture for compact Kähler manifolds with nef tangent bundle

Let XX be a compact Kähler manifold of complex dimension nn with nef tangent bundle TXTX, and define

χp(X):=χ(X,ΩXp).\chi^p(X):=\chi(X,\Omega_X^p).

Hodge-theoretic Hopf conjecture. For every pp with 0pn0\leq p\leq n,

(1)pχp(X)0.(-1)^p\cdot\chi^p(X)\geq 0.

The claim is a Hodge-theoretic analogue of the Kähler consequence of Hopf's curvature conjecture. It holds for compact Kähler manifolds with non-negative bisectional curvature, and the general nef-tangent-bundle case remains open.

Sources & referencesView supporting material

Primary source

Donu Arapura, Laurentiu Maxim and Botong Wang, “Hodge-theoretic variants of the Hopf and Singer Conjectures”, arXiv:2310.14131 (2024).

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