Items for "extremal rays"

Fano manifolds of coindex four as ample sections

We give a classification of pairs (X, L) consisting of a smooth complex n-dimensional projective variety X and an ample line bundle L on X such that Z ∈ is a Fano manifold with − K_Z = (dim Z − 3)H_Z for an ample and spanned line bundle H_Z on Z.

Keywords: KleimanMori cone, extremal rays, adjunction theory