Lefschetz fibrations with infinitely many sections
Geometric Topology
2024-09-24 v1 Symplectic Geometry
Abstract
The Arakelov--Parshin rigidity theorem implies that a holomorphic Lefschetz fibration of genus admits only finitely many holomorphic sections . We show that an analogous finiteness theorem does not hold for smooth or for symplectic Lefschetz fibrations. We prove a general criterion for a symplectic Lefschetz fibration to admit infinitely many homologically distinct sections and give many examples satisfying such assumptions. Furthermore, we provide examples that show that finiteness is not necessarily recovered by considering a coarser count of sections up to the action of the (smooth) automorphism group of a Lefschetz fibration.
Keywords
Cite
@article{arxiv.2409.15265,
title = {Lefschetz fibrations with infinitely many sections},
author = {Seraphina Eun Bi Lee and Carlos A. Serván},
journal= {arXiv preprint arXiv:2409.15265},
year = {2024}
}
Comments
21 pages, 8 figures