| HAL : hal-00600376, version 1 |
| arXiv : 1003.3804 |
| Fiche détaillée | Récupérer au format |
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| On the canonical degrees of curves in varieties of general type |
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| Pascal Autissier 1Antoine Chambert-Loir 2 |
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| (19/03/2010) |
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| A widely believed conjecture predicts that curves of bounded geometric genus lying on a variety of general type form a bounded family. One may even ask whether the canonical degree of a curve $C$ in a variety of general type is bounded from above by some expression $a\chi(C)+b$, where $a$ and $b$ are positive constants, with the possible exceptions corresponding to curves lying in a strict closed subset (depending on $a$ and $b$). A theorem of Miyaoka proves this for smooth curves in minimal surfaces, with $a>3/2$. A conjecture of Vojta claims in essence that any constant $a>1$ is possible provided one restricts oneself to curves of bounded gonality. We show by explicit examples that in general, the constant $a$ has to be at least equal to the dimension of the ambient variety. |
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| 1 : | Institut de Mathématiques de Bordeaux (IMB) |
| CNRS : UMR5251 – Université Sciences et Technologies - Bordeaux I – Université Victor Segalen - Bordeaux II | |
| 2 : | 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 | |
| 3 : | Institut de Recherche Mathématique Avancée (IRMA) |
| CNRS : UMR7501 – Université de Strasbourg | |
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| Domaine | : | Mathématiques/Géométrie algébrique |
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| Lien vers le texte intégral : |
| hal-00600376, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00600376 | |
| oai:hal.archives-ouvertes.fr:hal-00600376 | |
| Contributeur : Marie-Annick Guillemer | |
| Soumis le : Mardi 14 Juin 2011, 16:32:55 | |
| Dernière modification le : Mardi 14 Juin 2011, 16:32:55 | |