activity
20162026
most citedOn the monodromy group of desingularised moduli spaces of sheaves on K3 surfaces

19 citations · 31 across the 14 of their papers we have counts for

collaborators

16 papers

math.AG2026

Algebraic entropy of birational automorphism groups in families of hyper-Kähler manifolds

Francesco Antonio Denisi, Keiji Oguiso, Claudio Onorati +2

In this short note, we study the behavior of the algebraic entropy of birational automorphism groups in families of projective hyper-Kähler manifolds.

math.AG2026

Birational automorphism groups in families of hyper-Kähler manifolds

Francesco Antonio Denisi, Claudio Onorati, Francesca Rizzo +1

We study the behavior of birational automorphism groups in families of projective hyper-Kähler manifolds.

math.AG2025

Chern character of Schur bundles

Alessandro D'Andrea, Enrico Fatighenti, Claudio Onorati

Given a vector bundle , we give an explicit formula to compute Chern classes of Schur bundles in terms of those of .

math.AG2025

The SYZ conjecture for singular moduli spaces of sheaves on K3 surfaces

Claudio Onorati, Ángel David Ríos Ortiz

In this paper we prove the SYZ conjecture and we compute the Huybrechts--Riemann--Roch polynomial for irreducible symplectic varieties that are locally trivial deformation equivale…

math.AG2025

Deformations of twisted sheaves and formality results

Francesco Meazzini, Claudio Onorati

We show that infinitesimal deformations of twisted sheaves are controlled by the DG Lie algebra of their derived automorphisms. We prove that such DG Lie algebra is formal for poly…

math.CO2025

A plethystic chain rule

Alessandro D'Andrea, Enrico Fatighenti, Claudio Onorati

We consider a derivation on the ring of symmetric functions and investigate its combinatorial, algebraic and geometric properties. More precisely, we show that $\m…

math.AG2025

Higher discriminants of vector bundles and Schur functors

Alessandro D'Andrea, Enrico Fatighenti, Claudio Onorati

We prove some closed formulas for the logarithmic Chern character of a locally free sheaf. The argument used is representation-theoretic and we connect these formulas with the acti…

math.AG2024

Modular vector bundles with and without moduli

Enrico Fatighenti, Claudio Onorati

If is the Fano variety of lines of a smooth cubic fourfold, then we show that the restriction to of any Schur functor of the tautological quoti…

math.AG2023

Locally trivial monodromy of moduli spaces of sheaves on K3 surfaces

Claudio Onorati, Arvid Perego, Antonio Rapagnetta

In this paper we study monodromy operators on moduli spaces of sheaves on K3 surfaces with non-primitive Mukai vectors . If we write , with and primit…

math.AG2022★ 3 cited

Symplectic rigidity of O'Grady's tenfolds

Luca Giovenzana, Annalisa Grossi, Claudio Onorati +1

We prove that any symplectic automorphism of finite order of an irreducible holomorphic symplectic manifold of O'Grady's 10-dimensional deformation type is trivial.

math.AG2022

Hyper-holomorphic connections on vector bundles on hyper-Kähler manifolds

Francesco Meazzini, Claudio Onorati

We study infinitesimal deformations of autodual and hyper-holomorphic connections on complex vector bundles on hyper-Kähler manifolds of arbitrary dimension. In particular, we desc…

math.AG2022

On the period of Li, Pertusi and Zhao's symplectic variety

Franco Giovenzana, Luca Giovenzana, Claudio Onorati

We extend classical results of Perego and Rapagnetta on moduli spaces of sheaves of type OG10 to moduli spaces of Bridgeland semistable objects on the Kuznetsov component of a cubi…

math.AG2020★ 1 cited

Birational geometry of irreducible holomorphic symplectic tenfolds of O'Grady type

Giovanni Mongardi, Claudio Onorati

In this paper we analyse the birational geometry of O'Grady ten dimensional manifolds, giving a characterisation of Kaehler classes and lagrangian fibrations. Moreover, we study sy…

math.AG2020★ 8 cited

Symplectic birational transformations of finite order on O'Grady's sixfolds

Annalisa Grossi, Claudio Onorati, Davide Cesare Veniani

We prove that any symplectic automorphism of finite order on a manifold of type OG6 acts trivially on the Beauville--Bogomolov--Fujiki lattice and that any birational transformatio…

math.AG2020★ 19 cited

On the monodromy group of desingularised moduli spaces of sheaves on K3 surfaces

Claudio Onorati

We compute the monodromy group of irreducible holomorphic symplectic manifolds of OG10 type, confirming a conjecture of Markman.

math.AG2016

Connected components of moduli spaces of irreducible holomorphic symplectic manifolds of Kummer type

Claudio Onorati

Moduli spaces of polarised (with fixed polarisation type) irreducible holomorphic symplectic manifolds deformation equivalent to Hilbert schemes of points on surfaces are not…