Birational rigidity and Q-factoriality of a singular double quadric
| dc.creator | Shramov, Constantin | |
| dc.date | 2007-01-18 | |
| dc.date | 2008-03-30 | |
| dc.date.accessioned | 2026-07-07T09:29:13Z | |
| dc.date.available | 2026-07-07T09:29:13Z | |
| dc.description | We prove birational rigidity and calculate the group of birational automorphisms of a nodal Q-factorial double cover $X$ of a smooth three-dimensional quadric branched over a quartic section. We also prove that $X$ is Q-factorial provided that it has at most 11 singularities; moreover, we give an example of a non-Q-factorial variety of this type with 12 simple double singularities. | |
| dc.description | 14 pages; minor corrections | |
| dc.identifier | https://arxiv.org/abs/math/0701522 | |
| dc.identifier | http://arxiv.org/abs/math/0701522 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/157707 | |
| dc.subject | Algebraic Geometry | |
| dc.subject | 14E05 (Primary); 14E07, 14J30 (Secondary) | |
| dc.title | Birational rigidity and Q-factoriality of a singular double quadric | |
| dc.type | text |