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The dual complex of a \\(G\\)-variety
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Paper
The dual complex of a \\(G\\)-variety
2024
Overview
We introduce a new invariant of \\(G\\)-varieties, the dual complex, which roughly measures how divisors in the complement of the free locus intersect. We show that the top homology group of this complex is an equivariant birational invariant of \\(G\\)-varieties. As an application, we demonstrate the non-linearizability of certain large abelian group actions on smooth hypersurfaces in projective space of any dimension and degree at least \\(3\\).
Publisher
Cornell University Library, arXiv.org
Subject
