English

Elliptic-elliptic surfaces and the Hesse pencil

Algebraic Geometry 2024-09-30 v1

Abstract

We construct a family of elliptic surfaces with pg=q=1p_g=q=1 that arise from base change of the Hesse pencil. We identify explicitly a component of the higher Noether-Lefschetz locus with positive Mordell-Weil rank, and a particular surface having maximal Picard number and defined over Q\mathbb Q. These examples satisfy the infinitesimal Torelli theorem, providing a second proof of the dominance of period map, which was first obtained by Engel-Greer-Ward. A third proof is provided using the Shioda modular surface associated with Γ0(11)\Gamma_0(11). Finally, we find birational models for the degenerations at the boundary of the one-dimensional Noether-Lefschetz locus, and extend the period map at those limit points.

Keywords

Cite

@article{arxiv.2409.18927,
  title  = {Elliptic-elliptic surfaces and the Hesse pencil},
  author = {François Greer and Yilong Zhang},
  journal= {arXiv preprint arXiv:2409.18927},
  year   = {2024}
}

Comments

36 pages, 8 figures. Comments are welcome!