Discrete Morse theory for symmetric Delta-complexes

We generalize Forman's discrete Morse theory to the context of symmetric $Δ$-complexes. As an application, we prove that the coloop subcomplex of the link of the origin $LA^{\mathrm{trop},\mathrm{P}}_g$ in the moduli space of principally polarized tropical abelian varieties of dimension $g$ with respect to the perfect cone decomposition is contractible.

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