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math.AG2023
Correspondences acting on constant cycle curves on K3 surfaces
Sara Torelli
Constant cycle curves on a K3 surface over have been introduced by Huybrechts (2014) as curves whose points all define the same class in the Chow group. In this pa…
math.AG2023
Rigidity of modular morphisms via Fujita decomposition
Giulio Codogni, Víctor González-Alonso, Sara Torelli
In this note we prove that the Torelli, Prym and Spin-Torelli morphisms, as well as covering maps between moduli stacks of projective curves can not be deformed. The proofs use pro…