English

On normal subgroups in the fundamental groups of complex surfaces

Geometric Topology 2007-05-23 v1 Algebraic Geometry

Abstract

We show that for each aspherical compact complex surface XX whose fundamental group π\pi fits into a short exact sequence 1Kππ1(S)1 1\to K \to \pi \to \pi_1(S) \to 1 where SS is a compact hyperbolic Riemann surface and the group KK is finitely-presentable, there is a complex structure on SS and a nonsingular holomorphic fibration f:XSf: X\to S which induces the above short exact sequence. In particular, the fundamental groups of compact complex-hyperbolic surfaces cannot fit into the above short exact sequence. As an application we give the first example of a non-coherent uniform lattice in PU(2,1)PU(2,1).

Keywords

Cite

@article{arxiv.math/9808085,
  title  = {On normal subgroups in the fundamental groups of complex surfaces},
  author = {Michael Kapovich},
  journal= {arXiv preprint arXiv:math/9808085},
  year   = {2007}
}