Abstract
Let \(X\) be a compact Kähler manifold whose universal cover is \(\mathbb{C }^n\). A conjecture of Iitaka claims that some finite étale cover of \(X\) is a torus. We prove this conjecture in various cases in dimension four. We also show that in the projective case Iitaka’s conjecture is a consequence of the non-vanishing conjecture.
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Notes
The induced MMP might extract or flip a divisor on \(S\), cf. [23, Ch.4].
We do not suppose that \(k=n\), this additional flexibility is useful for the induction argument in the proofs below.
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Acknowledgments
We thank the Forschergruppe 790 “Classification of algebraic surfaces and compact complex manifolds” of the Deutsche Forschungsgemeinschaft for financial support. A. Höring was partially supported by the A.N.R. project “CLASS”, he acknowledges the support of the Albert-Ludwigs-Universität Freiburg where the main part of this work was done.
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Höring, A., Peternell, T. & Radloff, I. Uniformisation in dimension four: towards a conjecture of Iitaka. Math. Z. 274, 483–497 (2013). https://doi.org/10.1007/s00209-012-1081-1
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DOI: https://doi.org/10.1007/s00209-012-1081-1