Torsors and stable equivariant birational geometry

2022/04/06 by Brendan Hassett, Yuri Tschinkel, Hassett, Brendan +1 · 1 citation
Mathematics · #Advanced Operator Algebra Research #Algebraic Geometry (math.AG) #FOS: Mathematics #Geometric and Algebraic Topology #Homotopy and Cohomology in Algebraic Topology

paper · pdf · doi:10.48550/arxiv.2204.03106

openalex publication_date 2022/04/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We develop the formalism of universal torsors in equivariant birational geometry and apply it to produce new examples of nonbirational but stably birational actions of finite groups.

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• Equivariant unirationality of tori in small dimensions

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