Affine cones over cubic surfaces are flexible in codimension one
| Autor: | Perepechko, Alexander |
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| Rok vydání: | 2020 |
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| Zdroj: | Forum Mathematicum 33, no. 2 (2021), pp. 339-348 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1515/forum-2020-0191 |
| Popis: | Let Y be a smooth del Pezzo surface of degree 3 polarized by a very ample divisor that is not proportional to the anticanonical one. Then the affine cone over Y is flexible in codimension one. Equivalently, such a cone has an open subset with an infinitely transitive action of the special automorphism group on it. Comment: 11 pages; added an example of a flexible cone |
| Databáze: | arXiv |
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