Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Floris, Enrica"'
Autor:
Floris, Enrica, Zikas, Sokratis
We study the equivariant geometry of special quadric fibrations, called Umemura quadric fibrations, as well as the maximality of their automorphism groups inside $Cr_n(\mathbb{C})$. We produce infinite families of pairwise non-conjugate maximal conne
Externí odkaz:
http://arxiv.org/abs/2402.05021
We show that for any $n\geq5$ there exist connected algebraic subgroups in the Cremona group $\mathrm{Bir}(\mathbb{P}^n)$ that are not contained in any maximal connected algebraic subgroup. Our approach exploits the existence of stably rational, non-
Externí odkaz:
http://arxiv.org/abs/2311.04703
Autor:
Floris, Enrica, Pasquier, Boris
Let X and Y be horospherical Mori fibre spaces which are birational equivariantly with respect to the group action. Then, there is a horospherical Sarkisov program from X/S to Y /T .
Externí odkaz:
http://arxiv.org/abs/2212.10304
Autor:
Floris, Enrica, Höring, Andreas
Let $M \subset X$ be a submanifold of a rational homogeneous space $X$ such that the normal sequence splits. We prove that $M$ is also rational homogeneous.
Comment: 9 pages
Comment: 9 pages
Externí odkaz:
http://arxiv.org/abs/2210.13071
Autor:
Floris, Enrica
Let $f \colon (X,\Delta) \to Y$ be a fibration such that $K_X + \Delta$ is torsion along the fibres of $f$. Assume that $Y$ has dimension 2, or that $Y$ has dimension 3 and the fibres have dimension at most 3. Then the restriction of the moduli part
Externí odkaz:
http://arxiv.org/abs/2111.03373
Autor:
Blanc, Jérémy, Floris, Enrica
Let $X/\mathbb{P}^1$ be a Mori fibre space with general fibre of Picard rank at least two. We prove that there is a proper closed subset $S\subsetneq X$, invariant by the connected component of the identity ${\rm Aut}^{\circ}(X)$ of the automorphism
Externí odkaz:
http://arxiv.org/abs/2011.04940
Autor:
Boissière, Samuel, Floris, Enrica
Publikováno v:
Ãpijournal de Géométrie Algébrique, Volume 5 (July 12, 2021) epiga:7020
Let $G$ be a connected algebraic group. We study $G$-equivariant extremal contractions whose centre is a codimension three $G$-simply connected orbit. In the spirit of an important result by Kawakita in 2001, we prove that those contractions are weig
Externí odkaz:
http://arxiv.org/abs/2002.11016
Autor:
Floris, Enrica, Lazić, Vladimir
Publikováno v:
Birational Geometry and Moduli Spaces (E. Colombo, B. Fantechi, P. Frediani, D. Iacono, R. Pardini, eds.), Springer INdAM Series, vol. 39, Springer, 2020, pp. 37-55
We survey known results on the canonical bundle formula and its applications in algebraic geometry.
Comment: 17 pages, to appear in the Proceedings of the conference Birational Geometry and Moduli Spaces
Comment: 17 pages, to appear in the Proceedings of the conference Birational Geometry and Moduli Spaces
Externí odkaz:
http://arxiv.org/abs/1907.10490
Autor:
Floris, Enrica
The purpose of this note is to prove the $G$-equivariant Sarkisov program for a connected algebraic group $G$ following the proof of the Sarkisov program by Hacon and McKernan. As a consequence, we obtain a characterisation of connected subgroups of
Externí odkaz:
http://arxiv.org/abs/1810.05105
Autor:
Floris, Enrica, Lazić, Vladimir
Publikováno v:
Ãpijournal de Géométrie Algébrique, Volume 3 (October 15, 2019) epiga:5063
The B-Semiampleness Conjecture of Prokhorov and Shokurov predicts that the moduli part in a canonical bundle formula is semiample on a birational modification. We prove that the restriction of the moduli part to any sufficiently high divisorial valua
Externí odkaz:
http://arxiv.org/abs/1808.00717