Séminaires : Séminaire Théorie des Nombres

Equipe(s) : tn,
Responsables :Ziyang Gao, Marc Hindry, Bruno Kahn, João Pedro P. dos Santos
Email des responsables : ziyang.gao@imj-prg.fr
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Orateur(s) Yuichiro Hoshi - ,
Titre Galois-theoretic characterization of isomorphism classes of monodromically full hyperbolic curves of genus zero
Date20/06/2011
Horaire14:00 à 16:00
Diffusion
Résume By various works concerning Grothendieck's anabelian conjecture, it was proven that the isomorphism class of a hyperbolic curve over a number field is completely determined by the associated pro-l outer Galois representation. In this talk, we will discuss a stronger version of the above result, i.e., if a hyperbolic curve over a number field is of genus 0 and l-monodromically full, then the isomorphism class of the hyperbolic curve is completely determined by the kernel of the associated pro-l outer Galois representation. Note that the property of being monodromically full may be regarded as an analogue for hyperbolic curves of the property of not admitting complex multiplication for elliptic curves. From this point of view, this stronger version may be regarded as a genus 0 analogue of a result by Mochizuki which asserts that the isomorphism class of an elliptic curve which does not admit complex multiplication over a number field is completely determined by the kernels !of the natural Galois representations on the various finite quotients of its Tate module.
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