A complex of ribbon quivers and $\mathcal{M}_{g,m}$
Abstract
For any integer we introduce a complex spanned by genus ribbon quivers with marked boundaries and prove that its cohomology computes (up to a degree shift) the compactly supported cohomology of the moduli space of genus algebraic curves with marked points. We show that the totality of complexes has a natural dg Lie algebra structure which controls the deformation theory of the dg properad governing a certain class of (possibly, infinite-dimensional) degree pre-Calabi-Yau algebras. This result implies, in particular, that for the zero-th cohomology group of the derivation complex is one-dimensional (i.e. has no homotopy non-trivial automorphisms except rescalings), while for the cohomology group contains a subspace isomorphic to the Grothendieck-Teichm\"uller Lie algebra.
Keywords
Cite
@article{arxiv.2503.02020,
title = {A complex of ribbon quivers and $\mathcal{M}_{g,m}$},
author = {Sergei Merkulov},
journal= {arXiv preprint arXiv:2503.02020},
year = {2025}
}
Comments
In v2 the definition of the derivation complex given in Section 5 is rewritten in a more detailed and explicit way. Some misprints are corrected