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Super-rigid affine Fano varieties [PDF]

open access: yesCompositio Mathematica, 2018
We study a wide class of affine varieties, which we call affine Fano varieties. By analogy with birationally super-rigid Fano varieties, we define super-rigidity for affine Fano varieties, and provide many examples and non-examples of super-rigid affine Fano varieties.
Cheltsov, Ivan   +2 more
openaire   +7 more sources

Symmetries of Fano varieties

open access: yesJournal für die reine und angewandte Mathematik (Crelles Journal), 2023
Abstract Prokhorov and Shramov proved that the BAB conjecture, which Birkar later proved, implies the uniform Jordan property for automorphism groups of complex Fano varieties of fixed dimension. This property in particular gives an upper bound on the size of finite semi-simple groups (i.e., those with no nontrivial normal abelian ...
Louis Esser, Lena Ji, Joaquín Moraga
openaire   +3 more sources

Fano varieties with many selfmaps [PDF]

open access: yesAdvances in Mathematics, 2008
short version, 19 pages, to appear in Advances in ...
Ivan Cheltsov, Cheltsov, Ivan
openaire   +5 more sources

The Manin–Peyre conjecture for smooth spherical Fano varieties of semisimple rank one

open access: yesForum of Mathematics, Sigma
The Manin–Peyre conjecture is established for a class of smooth spherical Fano varieties of semisimple rank one. This includes all smooth spherical Fano threefolds of type T as well as some higher-dimensional smooth spherical Fano varieties.
Valentin Blomer   +3 more
doaj   +3 more sources

THE PSEUDO-INDEX OF HOROSPHERICAL FANO VARIETIES [PDF]

open access: yesInternational Journal of Mathematics, 2010
We prove a conjecture of Bonavero et al. on the pseudo-index of smooth Fano varieties, in the special case of horospherical varieties.
Pasquier, Boris
openaire   +5 more sources

On subvarieties of degenerations of Fano varieties

open access: yesInternational Journal of Mathematics
The goal of this work is to study geometric properties of geometrically irreducible subschemes on degenerations of Fano varieties (more generally, of separably rationally connected varieties). It is known that these geometrically irreducible subschemes exist when the ground field has characteristic zero or contains an algebraically closed subfield. We
Qu, Santai
openaire   +4 more sources

Fano varieties with conjecturally largest Fano index

open access: yesInternational Journal of Mathematics, 2023
For Fano varieties of various singularities such as canonical and terminal, we construct examples with large Fano index growing doubly exponentially with dimension. By low-dimensional evidence, we conjecture that our examples have the largest Fano index for all dimensions.
Wang, Chengxi
openaire   +4 more sources

On Fano and weak Fano Bott–Samelson–Demazure–Hansen varieties

open access: yesJournal of Pure and Applied Algebra, 2018
Accepted in Journal of Pure and Applied ...
B. Narasimha Chary   +1 more
openaire   +5 more sources

Fano varieties: positivity, K-stability and more [PDF]

open access: yes, 2022
This thesis is about Fano varieties and their properties. We will determine the K-stability of certain singular del Pezzo surfaces and smooth Fano 3-folds, the existence of cylinders in singular del Pezzo surfaces, and also classify higher dimensional ...
Viswanathan, Nivedita
core   +1 more source

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