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Mathematische Annalen (2013) 37 pages
Exemples de comptage de courbes sur les surfaces
David Bourqui 1
(2013)

Let X be a surface whose Cox ring has a single relation satisfying moreover a kind of linearity property. Under a simple assumption, we show that the geometric Manin's conjectures hold for some degrees lying in the dual of the effective cone of X (in particular, for those degrees the moduli space of morphisms has the expected dimension). The result applies to a class of generalized del Pezzo surfaces which has been intensively studied in the context of the arithmetic Manin's conjecture.
1:  Institut de Recherche Mathématique de Rennes (IRMAR)
CNRS : UMR6625 – Université de Rennes 1 – École normale supérieure de Cachan - ENS Cachan – Institut National des Sciences Appliquées (INSA) : - RENNES – Université de Rennes II - Haute Bretagne
Géométrie algébrique
Mathematics/Algebraic Geometry

Mathematics/Number Theory
moduli spaces of morphisms of curves – Manin's conjecture – height zeta function – global field of positive characteristic – Cox rings – singular del Pezzo surfaces
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