81 4.3.1. La torsion du groupe discret ? 1 82 4.3.2. La torsion d'ordre premier de ? geom Espaces de modules de courbes, lieux spéciaux un revêtement de degré trois de M 1, p.p sont égaux ,
M(? ) Pour ce faire, on note que les points de M(? ) sont représentés par des courbes elliptiques avec deux points de 2-torsion marqués ,
les points P 3 et P 6 réalisant ? 6 et ? 3 se confondent parce que P 3 admet ? 2 comme automorphisme. La figure ci-dessous synthétise la configuration totale des lieux spéciaux ,
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