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math.AG2007
Ample subvarieties and rationally connected fibrations
Mauro C. Beltrametti, Tommaso de Fernex, Antonio Lanteri
Under some positivity assumptions, extension properties of rationally connected fibrations from a submanifold to its ambient variety are studied. Given a family of rational curves…
math.AG2007
Higher Order Bad Loci
Gian Mario Besana, Sandra Di Rocco, Antonio Lanteri
Zero-schemes on smooth complex projective varieties, forcing all elements of ample and free linear systems to be reducible are studied. Relationships among the minimal length of su…