Birational involutions of the real projective plane

Fuente: arXiv
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Autori principali: Cheltsov, Ivan, Mangolte, Frédéric, Yasinsky, Egor, Zimmermann, Susanna
Natura: Preprint
Pubblicazione: 2022
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author Cheltsov, Ivan
Mangolte, Frédéric
Yasinsky, Egor
Zimmermann, Susanna
author_facet Cheltsov, Ivan
Mangolte, Frédéric
Yasinsky, Egor
Zimmermann, Susanna
contents We classify birational involutions of the real projective plane up to conjugation. In contrast with an analogous classification over the complex numbers (due to E. Bertini, G. Castelnuovo, F. Enriques, L. Bayle and A. Beauville), which includes 4 different classes of involutions, we discover 12 different classes over the reals, and provide many examples when the fixed curve of an involution does not determine its conjugacy class in the real plane Cremona group.
format Preprint
id arxiv_https___arxiv_org_abs_2208_00217
institution arXiv
publishDate 2022
record_format arxiv
spellingShingle Birational involutions of the real projective plane
Cheltsov, Ivan
Mangolte, Frédéric
Yasinsky, Egor
Zimmermann, Susanna
Algebraic Geometry
14E07, 14E05, 14E30, 14J45, 14P99
We classify birational involutions of the real projective plane up to conjugation. In contrast with an analogous classification over the complex numbers (due to E. Bertini, G. Castelnuovo, F. Enriques, L. Bayle and A. Beauville), which includes 4 different classes of involutions, we discover 12 different classes over the reals, and provide many examples when the fixed curve of an involution does not determine its conjugacy class in the real plane Cremona group.
title Birational involutions of the real projective plane
topic Algebraic Geometry
14E07, 14E05, 14E30, 14J45, 14P99
url https://arxiv.org/abs/2208.00217