Mathematical Research Letters

Volume 23 (2016)

Number 2

Torsion points on the cohomology jump loci of compact Kähler manifolds

Pages: 545 – 563



Botong Wang (Department of Mathematics, KU Leuven, Flanders, Belgium)


We prove that each irreducible component of the cohomology jump loci of rank one local systems over a compact Kähler manifold contains at least one torsion point. This generalizes a theorem of Simpson for smooth complex projective varieties. An immediate consequence is the positive answer to a conjecture of Beauville and Catanese for compact Kähler manifolds. We also provide an example of a compact Kähler manifold, whose cohomology jump loci can not be realized by any smooth complex projective variety.

Accepted 23 November 2015

Published 6 June 2016