A Characterization of Some Fano 4-folds Through Conic Fibrations
Date Issued
2021-07
Author(s) USM
DOI
10.1093/imrn/rnz244
Abstract
We find a characterization for Fano 4-folds X with Lefschetz defect delta(X) = 3: besides the product of two del Pezzo surfaces, they correspond to varieties admitting a conic bundle structure f : X -> Y with rho(X) - rho(Y) = 3. Moreover, we observe that
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