The TnT_n conjecture on compact Kähler manifolds with generically large fundamental group

Let XX be a compact Kähler manifold of dimension nn with generically large fundamental group, meaning that the fundamental-group image of every subvariety through a very general point is infinite. Suppose that either

there exists a proper modification C~kCk and a surjective map C~kX~,\text{there exists a proper modification }\widetilde{\mathbb{C}}^k\to\mathbb{C}^k\text{ and a surjective map }\widetilde{\mathbb{C}}^k\to\widetilde X,

or κ(X)0\kappa(X)\leq 0, where X~\widetilde X is the universal covering. The TnT_n conjecture. There exists a finite étale cover XXX'\to X such that XX' is bimeromorphic to a torus.

This is presented as a reduction step toward Iitaka's conjecture for non-algebraic compact Kähler manifolds that are not simple. Its general validity is not established in the source.

Sources & referencesView supporting material

Primary source

Andreas Höring, Thomas Peternell and Ivo Radloff, “Uniformisation in dimension four: towards a conjecture of Iitaka”, arXiv:1103.5392 (2017).

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