Géométrie algébrique; Surfaces de genre zéro; Courbes bicanoniques
Abstract :
[fr] Une surface non rationnelle, de genres arithmétique et géométrique nuis,
étant donnée, on prouve l’existence, sur cette surface, soit d une courbe
six-canonique formée d’une part par trois courbes bicanoniques et d'autre
part par deux courbes tricanoniques, soit d’une courbe octocanonique formée
d’une part par deux courbes tétracanoniques, d’autre part par une courbe
pentacanonique jointe à une courbe tricanonique. On en déduit l’existence
de certaines courbes au moyen desquelles sont formés les systèmes pluricanoniques de la surface.
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