sfilip
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Registered User
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Feb 8 |
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Birational Automorphisms and infinite divisibility Thanks a lot for this answer and for all the references! |
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Feb 8 |
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Birational Automorphisms and infinite divisibility added 36 characters in body |
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Feb 6 |
awarded | ● Critic |
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Feb 6 |
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Birational Automorphisms and infinite divisibility Jérémy, thanks a lot for the results and references! I was in fact curious if anything is known about the growth rate of the degree of a general birational automorphism (in arbitrary dimension)? I realize one can't expect a general classification, but perhaps something besides the possibility of exponential growth is known? |
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Feb 6 |
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Birational Automorphisms and infinite divisibility Unfortunately the Cantat and Lamy results and methods apply only to the planar Cremona group, as far as I understand them. The hyperbolic space comes from the intersection form on the divisors, and that's only available in dimension two. |
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Feb 6 |
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Birational Automorphisms and infinite divisibility added 612 characters in body |
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Feb 6 |
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Birational Automorphisms and infinite divisibility added 55 characters in body |
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Feb 6 |
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Birational Automorphisms and infinite divisibility @Mariano I was hoping to suggest that "birational action" means a birational map $\mathbb{G}_a\times X \to X$ with the natural compatibility conditions making it an action. This would be one way to make sense of the question, but there might be other reasonable ones. |
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Feb 5 |
awarded | ● Editor |
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Feb 5 |
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Birational Automorphisms and infinite divisibility Apologies for being vague, I've tried to fix the question a bit. Yves, unfortunately I'm ignorant even about the algebraic situation. |
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Feb 5 |
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Birational Automorphisms and infinite divisibility added 224 characters in body |
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Feb 5 |
asked | Birational Automorphisms and infinite divisibility |
