English

Certified Severi dimensions for hyperelliptic and supersymmetric cusps

Algebraic Geometry 2023-10-18 v2 Combinatorics

Abstract

In a previous paper, the first three authors formulated a precise conjecture about the dimension of the {\it generalized Severi variety} Md,g;S,knM^n_{d,g; {\rm S}, {\bf k}} of degree-dd holomorphic maps P1Pn\mathbb{P}^1 \rightarrow \mathbb{P}^n whose images' singularities are singleton cusps with value semigroups S{\rm S} and ramification profiles k{\bf k}. In this paper, we prove that an adjusted form of the conjecture holds for generic profiles k{\bf k} associated with two distinguished (infinite) classes of semigroups S{\rm S}.

Keywords

Cite

@article{arxiv.2211.09874,
  title  = {Certified Severi dimensions for hyperelliptic and supersymmetric cusps},
  author = {Ethan Cotterill and Vinícius Lima and Renato Vidal Martins and Alexandre Reis},
  journal= {arXiv preprint arXiv:2211.09874},
  year   = {2023}
}

Comments

Adjusted numerical hypotheses, as our method requires that d be at least the valuation of the conductor of the cusp, which e.g. is true whenever $d \geq 2g$; submitted

R2 v1 2026-06-28T06:09:51.144Z