English

Projective structures and Hodge theory

Algebraic Geometry 2024-07-15 v2 Differential Geometry

Abstract

Every compact Riemann surface XX admits a natural projective structure pup_u as a consequence of the uniformization theorem. In this work we describe the construction of another natural projective structure on XX, namely the Hodge projective structure php_h, related to the second fundamental form of the period map. We then describe how projective structures correspond to (1,1)(1,1)-differential forms on the moduli space of projective curves and, from this correspondence, we deduce that pup_u and php_h are not the same structure.

Keywords

Cite

@article{arxiv.2405.18122,
  title  = {Projective structures and Hodge theory},
  author = {Andrea Causin and Gian Pietro Pirola},
  journal= {arXiv preprint arXiv:2405.18122},
  year   = {2024}
}

Comments

This paper is based on the plenary conference "Strutture proiettive e teoria di Hodge" given by the second author at the XXII Congress of the "Unione Matematica Italiana", held in Pisa in September 5, 2023

R2 v1 2026-06-28T16:43:45.962Z