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- W4320032297 abstract "A new tool for the model theory of differentially closed fields and of compact complex manifolds is here developed. In such settings, it is shown that a type internal to the field of constants (resp. to the projective line) admits a maximal image whose binding group is an abelian variety. The properties of such abelian reductions are investigated in the Galois-theoretic framework provided by stability theory. Several geometric consequences for the birational geometry of algebraic vector fields of characteristic zero are then deduced. In particular, (1) it is shown that if some cartesian power of an algebraic vector field admits a nontrivial rational first integral then already the second power does, (2) two-dimensional isotrivial algebraic vector fields are classified up to birational equivalence, and (3) algebraic vector fields whose finite covers admit no nontrivial factors are studied in arbitrary dimension. Analogues of these results in bimeromorphic geometry are also obtained." @default.
- W4320032297 created "2023-02-12" @default.
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- W4320032297 date "2022-07-15" @default.
- W4320032297 modified "2023-10-15" @default.
- W4320032297 title "Abelian reduction in differential-algebraic and bimeromorphic geometry" @default.
- W4320032297 doi "https://doi.org/10.48550/arxiv.2207.07515" @default.
- W4320032297 hasPublicationYear "2022" @default.
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