Benvenuti nell'Anagrafe della Ricerca d'Ateneo
La valutazione delle attività di ricerca che si svolgono nelle università ha assunto un'importanza rilevante sia per l'intero sistema universitario sia all'interno di ogni singolo ateneo. Roma Tre si è quindi dotata di idonei strumenti informativi in grado di supportare al meglio le azioni di monitoraggio e di valutazione delle attività di ricerca svolte nei propri dipartimentied ha realizzato una Anagrafe della Ricerca di Ateneo.
EnglishLet C be a smooth complex projective curve of genus g and let C(2) be its second symmetric product. This paper concerns the study of some attempts at extending to C(2) the notion of gonality. In particular, we prove that the degree of irrationality of C(2) is at least g-1 when C is generic, and that the minimum gonality of curves through the generic point of C(2) equals the gonality of C. In order to produce the main results we deal with correspondences on the k-fold symmetric product of C, with some interesting linear subspaces of P^n enjoying a condition of Cayley-Bacharach type, and with monodromy of rational maps. As an application, we also give new bounds on the ample cone of C(2) when C is a generic curve of genus 6 ≤ g ≤ 8.
Bastianelli F (2012). On symmetric products of curves. TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 364(5), 2493-2519.
| Titolo: | On symmetric products of curves |
| Autori: | |
| Data di pubblicazione: | 2012 |
| Rivista: | |
| Citazione: | Bastianelli F (2012). On symmetric products of curves. TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 364(5), 2493-2519. |
| Abstract: | Let C be a smooth complex projective curve of genus g and let C(2) be its second symmetric product. This paper concerns the study of some attempts at extending to C(2) the notion of gonality. In particular, we prove that the degree of irrationality of C(2) is at least g-1 when C is generic, and that the minimum gonality of curves through the generic point of C(2) equals the gonality of C. In order to produce the main results we deal with correspondences on the k-fold symmetric product of C, with some interesting linear subspaces of P^n enjoying a condition of Cayley-Bacharach type, and with monodromy of rational maps. As an application, we also give new bounds on the ample cone of C(2) when C is a generic curve of genus 6 ≤ g ≤ 8. |
| Handle: | http://hdl.handle.net/11590/137920 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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