Nagoya Mathematical Journal

On planar Cremona maps of prime order

Tommaso de Fernex

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Abstract

This paper contains a new proof of the classification of prime order elements of $\Bir(\P^2)$ up to conjugation. The first results on this topic can be traced back to classic works by Bertini and Kantor, among others. The innovation introduced by this paper consists of explicit geometric constructions of these Cremona transformations and the parameterization of their conjugacy classes. The methods employed here are inspired to [4], and rely on the reduction of the problem to classifying prime order automorphisms of rational surfaces. This classification is completed by combining equivariant Mori theory to the analysis of the action on anticanonical rings, which leads to characterize the cases that occur by explicit equations (see [28] for a different approach). Analogous constructions in higher dimensions are also discussed.

Article information

Source
Nagoya Math. J., Volume 174 (2004), 1-28.

Dates
First available in Project Euclid: 27 April 2005

Permanent link to this document
https://projecteuclid.org/euclid.nmj/1114632066

Mathematical Reviews number (MathSciNet)
MR2066103

Zentralblatt MATH identifier
1062.14019

Subjects
Primary: 14E07: Birational automorphisms, Cremona group and generalizations

Citation

de Fernex, Tommaso. On planar Cremona maps of prime order. Nagoya Math. J. 174 (2004), 1--28. https://projecteuclid.org/euclid.nmj/1114632066


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