Automorphisms of the plane preserving a curve
Algebraic Geometry
2016-11-24 v2
Abstract
We study the group of automorphisms of the affine plane preserving some given curve, over any field. The group is proven to be algebraic, except in the case where the curve is a bunch of parallel lines. Moreover, a classification of the groups of positive dimension occuring is also given in the case where the curve is geometrically irreducible and the field is perfect.
Cite
@article{arxiv.1304.2549,
title = {Automorphisms of the plane preserving a curve},
author = {Jérémy Blanc and Immanuel Stampfli},
journal= {arXiv preprint arXiv:1304.2549},
year = {2016}
}
Comments
21 pages, typos corrected, minor changes, improved exposition