Modular Vector Fields for Lattice Polarized K3
Algebraic Geometry
2024-04-11 v1 Complex Variables
Abstract
We consider a moduli space of lattice polarized K3 surfaces with the additional information of a frame of the trascendental cohomology with respect to the lattice polarization. This moduli space is proved to be quasi-affine, and the existence of vector fields on it, called modular vector fields, is proved. A purely algebraic version of the algebra of Siegel quasi-modular forms is obtained as the algebra of global regular functions over this moduli space, with a differential structure coming from the modular vector fields. By means of trascendental considerations we are able to obtain a differential algebra of meromorphic Siegel quasi-modular forms from the previous algebra.
Cite
@article{arxiv.2404.06662,
title = {Modular Vector Fields for Lattice Polarized K3},
author = {Walter Páez Gaviria},
journal= {arXiv preprint arXiv:2404.06662},
year = {2024}
}