English

Period integrals of hypersurfaces via tropical geometry

Algebraic Geometry 2025-04-24 v2

Abstract

Let {Zt}t\left\{ Z_t \right\}_t be a one-parameter family of complex hypersurfaces of dimension d1d \geq 1 in a toric variety. We compute asymptotics of period integrals for {Zt}t\left\{ Z_t \right\}_t by applying the method of Abouzaid--Ganatra--Iritani--Sheridan, which uses tropical geometry. As integrands, we consider Poincar\'{e} residues of meromorphic (d+1)(d+1)-forms on the ambient toric variety, which have poles along the hypersurface ZtZ_t. The cycles over which we integrate them are spheres and tori which correspond to tropical (0,d)(0, d)-cycles and (d,0)(d, 0)-cycles on the tropicalization of {Zt}t\left\{ Z_t \right\}_t respectively. In the case of d=1d=1, we explicitly write down the polarized logarithmic Hodge structure of Kato--Usui at the limit as a corollary. Throughout this article, we impose the assumption that the tropicalization is dual to a unimodular triangulation of the Newton polytope.

Keywords

Cite

@article{arxiv.2205.00814,
  title  = {Period integrals of hypersurfaces via tropical geometry},
  author = {Yuto Yamamoto},
  journal= {arXiv preprint arXiv:2205.00814},
  year   = {2025}
}

Comments

34 pages, 4 figure. v2: revised following the suggestions by the referees