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Steklov Mathematical Institute Seminar
April 18, 2024 16:00, Moscow, Steklov Mathematical Institute of RAS, Conference Hall (8 Gubkina)


Non-regularizable birational automorphisms

A. Kuznetsova

Steklov Mathematical Institute of Russian Academy of Sciences, Moscow


https://youtu.be/k7-Mv-jhpJ4

Abstract: A birational automorphism $f$ of an algebraic variety $X$ is an algebraic isomorphism of one Zariski open subset of $X$ to another open subset. A natural question arises: is there a birational model of $X$ where $f$ induces a regular automorphism. This question is related to the invariants of the inverse image action of $f$ on the singular cohomology groups of $X$. I am going to talk about this relation with an example of a birational automorphism of a three dimensional projective space which preserves a cubic surface pointwise.


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