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math.AG2019
On some Fano 4-folds with Lefschetz defect 3
Eleonora Anna Romano
We show that Fano 4-folds with Picard number 5 have Lefschetz defect 3 if and only if they are toric of combinatorial type K. We also find a characterization for such varieties in…
math.AG2019
A note on flatness of some fiber type contractions
Eleonora Anna Romano
We discuss the flatness property of some fiber type contractions of complex smooth projective varieties of arbitrary dimensions. We relate the flatness of some morphisms having one…
math.AG2019
Adjunction for varieties with a action
Eleonora A. Romano, Jarosław A. Wiśniewski
Let be a complex projective manifold, an ample line bundle on , and assume that we have a action on . We classify such triples …