Remarks on the group of birational selfmaps of a conic fibration
arXiv:2602.12946
Abstract
We study the group of birational selfmaps of a variety birational to a conic bundle. We prove that it admits a surjective morphism to the direct sum of an uncountable number of copies of $\mathbb Z/2\IZ$.
10 pages, title has been changed, the main theorem changed and two more statements were added. Comments are welcome