Threefolds with nef anticanonical bundles.
Thomas Peternell, Fernando Serrano (1998)
Collectanea Mathematica
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In this paper we study the global structure of projective threefolds X whose anticanonical bundle -KX is nef.
Thomas Peternell, Fernando Serrano (1998)
Collectanea Mathematica
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In this paper we study the global structure of projective threefolds X whose anticanonical bundle -KX is nef.
M. C. Beltrametti, A. J. Sommese (1995)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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Roberto Paoletti (1995)
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni
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A notion of positivity, called Seshadri ampleness, is introduced for a smooth curve in a polarized smooth projective -fold , whose motivation stems from some recent results concerning the gonality of space curves and the behaviour of stable bundles on under restriction to . This condition is stronger than the normality of the normal bundle and more general than being defined by a regular section of an ample rank- vector bundle. We then explore some of the properties of Seshadri-ample...
Mark Andrea A. De Cataldo (1998)
Annales de l'institut Fourier
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We prove a multiple-points higher-jets nonvanishing theorem by the use of local Seshadri constants. Applications are given to effectivity problems such as constructing rational and birational maps into Grassmannians, and the global generation of vector bundles.
Antonio Lanteri, Hidetoshi Maeda (2003)
Collectanea Mathematica
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Michał Szurek, Jarosław A. Wisniewski (1990)
Compositio Mathematica
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Edoardo Ballico, Luciana Ramella (1999)
Revista Matemática Complutense
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