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Computation of some Moduli Spaces of covers and explicit Sn and An regular Q(T)-extensions with totally real fibers

Emmanuel Hallouin, Emmanuel Riboulet-Deyris

math.NTarXiv:math/0202125

Abstract

We study and compute an infinite family of Hurwitz spaces parameterizing covers of PC branched at four points and deduce explicit regular Sn and An-extensions over Q(T) with totally real fibers.

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