Moduli spaces of tropical curves of higher genus with marked points and homotopy colimits

Abstract

The main characters of this paper are the moduli spaces $T{M}_{g,n}$ of rational tropical curves of genus $g$ with $n$ marked points, with $g\ge 2$. We reduce the study of the homotopy type of these spaces to the analysis of compact spaces $X_{g,n}$, which in turn possess natural representations as a homotopy colimits of diagrams of topological spaces over combinatorially defined generalized simplicial complexes ${\Delta }_g$, with the latter being interesting on their own right. We use these homotopy colimit representations to describe a CW complex decomposition for each $X_{g,n}$. Furthermore, we use these developments, coupled with some standard tools for working with homotopy colimits, to perform an in-depth analysis of special cases of genus 2 and 3, gaining a complete understanding of the moduli spaces $X_{2,0}$, $X_{2,1}$, $X_{2,2}$, and $X_{3,0}$, as well as a partial understanding of other cases, resulting in several open questions and in further conjectures.

References in corpus (1)

• Moduli spaces of rational tropical curves

Cited by in corpus (1)

• Tropical Hurwitz Spaces