Infinite families of inequivalent real circle actions on affine four-space

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TitreInfinite families of inequivalent real circle actions on affine four-space
Type de publicationJournal Article
Year of Publication2019
AuteursMoser-Jauslin L.
JournalEPIJOURNAL DE GEOMETRIE ALGEBRIQUE
Volume3
Pagination1
Date PublishedMAR 1
Type of ArticleArticle
ISSN2491-6765
Mots-cléscircle actions, non-linearizable actions, real affine varieties, Real forms
Résumé

The main result of this article is to construct infinite families of non-equivalent equivariant real forms of linear C*-actions on affine four-space. We consider the real form of C* whose fixed point is a circle. In [F-MJ] one example of a non-linearizable circle action was constructed. Here, this result is generalized by developing a new approach which allows us to compare different real forms. The constructions of these forms are based on the structure of equivariant O-2(C)-vector bundles.