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math.AG2018
Hurwitz Stacks of Groups Extensions and Irreducibility
Benjamin Collas, Sylvain Maugeais
We study the irreducible components of special loci of curves whose group of symmetries is given as certain group extension. We introduce some relative Hurwitz data, which we show…
math.AG2018
Monodromy of elliptic curve convolution, seven-point sheaves of -type and motives of Beauville type
Benjamin Collas, Michael Dettweiler, Stefan Reiter +1
We study the Tannakian properties of the category of perverse sheaves on elliptic curves endowed with the convolution product. We establish that for certain sheaves with unipotent…
math.AG2014★ 4 cited
On Galois action on stack inertia of moduli spaces of curves
Benjamin Collas, Sylvain Maugeais
We establish that the geometric action of the absolute Galois group on the étale fundamental group of moduli spaces of curves induces a Galois action on its stack inertia subgroups…