3 papers
math.AG2026
Remarks on the group of birational selfmaps of a conic fibration
Enrica Floris
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 cop…
math.AG2025
Umemura Quadric Fibrations and Maximal Subgroups of
Enrica Floris, Sokratis Zikas
We study the equivariant geometry of special quadric fibrations, called Umemura quadric fibrations, as well as the maximality of their automorphism groups inside …
math.AG2024
Maximal subgroups in the Cremona group
Andrea Fanelli, Enrica Floris, Susanna Zimmermann
We show that for any there exist connected algebraic subgroups in the Cremona group that are not contained in any maximal connected algebraic…