English

Moduli spaces of witch curves topologically realize the 2-associahedra

Symplectic Geometry 2019-10-15 v2

Abstract

For r1r \geq 1 and nZ0r{0}\mathbf{n} \in \mathbb{Z}_{\geq0}^r\setminus\{\mathbf{0}\}, we construct the compactified moduli space 2Mn\overline{2\mathcal{M}}_{\mathbf{n}} of witch curves of type n\mathbf{n}. We equip 2Mn\overline{2\mathcal{M}}_{\mathbf{n}} with a stratification by the 2-associahedron WnW_{\mathbf{n}}, and prove that 2Mn\overline{2\mathcal{M}}_{\mathbf{n}} is compact and metrizable. In addition, we show that the forgetful map 2MnMr\overline{2\mathcal{M}}_{\mathbf{n}} \to \overline{\mathcal{M}}_r to the moduli space of stable disk trees is continuous and respects the stratifications.

Keywords

Cite

@article{arxiv.1712.01194,
  title  = {Moduli spaces of witch curves topologically realize the 2-associahedra},
  author = {Nathaniel Bottman},
  journal= {arXiv preprint arXiv:1712.01194},
  year   = {2019}
}

Comments

21 pages, 9 figures. Final version for publication in Journal of Symplectic Geometry