The solvable Homeomorphism Conjecture for moduli spaces of fundamental groups

Let p>0p>0 be the characteristic. Retain the Frobenius-quotiented moduli space Mg,n\overline{\mathfrak{M}}_{g,n} of pointed stable curves of type (g,n)(g,n) and let Πg,nsol\overline\Pi^{\rm sol}_{g,n} be the moduli space of solvable admissible fundamental groups of pointed stable curves of type (g,n)(g,n), equipped with its anabelian topology. Let

πg,nsol:Mg,nΠg,nsol\pi_{g,n}^{\rm sol}:\overline{\mathfrak{M}}_{g,n}\twoheadrightarrow\overline\Pi^{\rm sol}_{g,n}

be the natural map. Solvable Homeomorphism Conjecture. The map πg,nsol\pi_{g,n}^{\rm sol} is a homeomorphism. This is presented as a slightly stronger solvable version of the Homeomorphism Conjecture. The corresponding set-theoretic bijection is likewise formulated as a solvable version of the Weak Isom-version Conjecture, but the homeomorphism assertion remains open in the supplied text.

Sources & referencesView supporting material

Primary source

Yu Yang, “Moduli spaces of fundamental groups of curves in positive characteristic I”, arXiv:2010.01806 (2020).

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