The Cremona group is compactly presentable
Algebraic Geometry
2016-04-28 v2
Abstract
This article shows that the Cremona group is compactly presentable. To prove this we show that it is a generalised amalgamated product of three of its algebraic subgroups (automorphisms of the plane and Hirzebruch surfaces) divided by one relation.
Cite
@article{arxiv.1408.4352,
title = {The Cremona group is compactly presentable},
author = {Susana Zimmermann},
journal= {arXiv preprint arXiv:1408.4352},
year = {2016}
}