English

Estimates and asymptotics of Teichm\"uller modular forms

Complex Variables 2024-12-19 v1 Number Theory

Abstract

In this article, we derive estimates of Teichm\"uller modular forms, and associated invariants. Let Mg\mathcal{M}_{g} denote the moduli space of compact hyperbolic Riemann surfaces of genus g2g\geq 2, and let Mg\overline{M}_{g} be the Deligne-Mumford compactification of Mg\mathcal{M}_{g}, and we denote its boundary by Mg\partial\mathcal{M}_{g}. Let π:CgMg\pi:\mathcal{C}_{g}\longrightarrow\mathcal{M}_{g} be the universal surface. For any n1n\geq 1, let Λn:=π(TvCg)n\Lambda_{n}:=\pi_{\ast}(T_{v}\mathcal{C}_{g})^{n}, where TvCgT_{v}\mathcal{C}_{g} denotes the vertical holomorphic tangent bundle of the fibration π\pi, and the fiber of Λn\Lambda_{n} over any XMgX\in\mathcal{M}_{g} is equal to H0(X,ΩXn)H^{0}(X,\Omega_{X}^{\otimes n}), the space of holomorphic differentials of degree-nn, defined over the Riemann surface XX. Let λn:=det(Λn)\lambda_{n}:=\mathrm{det}(\Lambda_{n}) denote the determinant line bundle of the vector bundle Λn\Lambda_{n}, whose sections are known as Teichm\"uller modular forms. The complex vector space of Teichm\"uller modular forms is equipped with Quillen metric, which is denoted by Qu\|\cdot\|_{\mathrm{Qu}}.

Keywords

Cite

@article{arxiv.2412.13997,
  title  = {Estimates and asymptotics of Teichm\"uller modular forms},
  author = {Anilatmaja Aryasomayajula and Debasish Sadhukhan},
  journal= {arXiv preprint arXiv:2412.13997},
  year   = {2024}
}

Comments

First version, and looking forward to comments

R2 v1 2026-06-28T20:40:43.130Z