The automorphism group of the non-split Cartan modular curve of level 11

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Title:	The automorphism group of the non-split Cartan modular curve of level 11
Author:	Dose, Valerio; Fernández González, Julio; González Rovira, Josep; Schoof, Rene
Other authors:	Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada IV; Universitat Politècnica de Catalunya. TN - Grup de Recerca en Teoria de Nombres
Abstract:	We derive equations for the modular curve X-ns(11) associated to a non-split Cartan subgroup of GL(2)(F-11). This allows us to compute the automorphism group of the curve and show that it is isomorphic to Klein's four group. (C) 2014 Elsevier Inc. All rights reserved.
Subject(s):	-Àrees temàtiques de la UPC::Matemàtiques i estadística::Geometria::Geometria algebraica -Modular curves -Arithmetic -Geometry -Modular curve -Non-split Cartan subgroup -Corbes modulars -Geometria algebraica aritmètica
Rights:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Article
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