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Cremona Groups and the Icosahedron - Chapman & Hall / CRC Monographs and Research Notes in Mathematics Ivan Cheltsov 1st edition
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Cremona Groups and the Icosahedron - Chapman & Hall / CRC Monographs and Research Notes in Mathematics
Ivan Cheltsov
Cremona Groups and the Icosahedron focuses on the Cremona groups of ranks 2 and 3 and describes the beautiful appearances of the icosahedral group A5 in them. The book surveys known facts about surfaces with an action of A5, explores A5-equivariant geometry of the quintic del Pezzo threefold V5, and gives a proof of its A5-birational rigidity.
The authors explicitly describe many interesting A5-invariant subvarieties of V5, including A5-orbits, low-degree curves, invariant anticanonical K3 surfaces, and a mildly singular surface of general type that is a degree five cover of the diagonal Clebsch cubic surface. They also present two birational selfmaps of V5 that commute with A5-action and use them to determine the whole group of A5-birational automorphisms. As a result of this study, they produce three non-conjugate icosahedral subgroups in the Cremona group of rank 3, one of them arising from the threefold V5.
This book presents up-to-date tools for studying birational geometry of higher-dimensional varieties. In particular, it provides readers with a deep understanding of the biregular and birational geometry of V5.
550 pages, 36 black & white illustrations, 10 black & white tables
| Media | Books Hardcover Book (Book with hard spine and cover) |
| Released | August 21, 2015 |
| ISBN13 | 9781482251593 |
| Publishers | Taylor & Francis Inc |
| Pages | 528 |
| Dimensions | 166 × 242 × 36 mm · 924 g |
| Language | English |
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