Tropical moduli spaces as symmetric Δ$\Delta$‐complexes
Tropical moduli spaces as symmetric Δ$\Delta$‐complexes
复制标题
作为对称 Î$Delta$âcomplex 的热带模空间
DOI:
10.1112/blms.12570
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发表时间:
2022
影响因子:
0.9
通讯作者:
Payne, Sam
中科院分区:
文献类型:
--
作者:
Allcock, Daniel;Corey, Daniel;Payne, Sam
We develop techniques for studying fundamental groups and integral singular homology of symmetric Δ$\Delta$‐complexes, and apply these techniques to study moduli spaces of stable tropical curves of unit volume, with and without marked points. As one application, we show that Δg$\Delta _g$ and Δg,n$\Delta _{g,n}$ are simply connected, for g⩾1$g \geqslant 1$. We also show that Δ3$\Delta _3$ is homotopy equivalent to the 5‐sphere, and that Δ4$\Delta _4$ has 3‐torsion in H5$H_5$.