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math.AG2026
Generalized Nikulin surfaces and irreducible symplectic fourfolds
Chiara Camere, Alice Garbagnati, Grzegorz Kapustka +1
A Nikulin surface is the minimal resolution of the quotient of a surface by a symplectic involution . Equivalently, it is the -dimensional component of the fixed l…
math.AG2026
Specializations of symplectic and van Geemen--Sarti involutions on K3 surfaces
Alice Garbagnati
Given a symplectic involution on a K3 surface , the desingularization of is still a K3 surface, which in general has a different Néron--Severi group. Nevertheless,…