On the second exterior power of tangent bundles of threefolds
Frédéric Campana, Thomas Peternell (1992)
Compositio Mathematica
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Displaying similar documents to “Threefolds with nef anticanonical bundles.”
On the second exterior power of tangent bundles of threefolds
Ample vector bundles with zero loci having a bielliptic curve section.
Antonio Lanteri, Hidetoshi Maeda (2003)
Collectanea Mathematica
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On the dimension of the adjoint linear system for threefolds
M. C. Beltrametti, A. J. Sommese (1995)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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Threefolds with big and nef anticanonical bundles II
Priska Jahnke, Thomas Peternell, Ivo Radloff (2011)
Open Mathematics
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In a follow-up to our paper [Threefolds with big and nef anticanonical bundles I, Math. Ann., 2005, 333(3), 569–631], we classify smooth complex projective threefolds Xwith −K X big and nef but not ample, Picard number γ(X) = 2, and whose anticanonical map is small. We assume also that the Mori contraction of X and of its flop X + are not both birational.
Seshadri positive curves in a smooth projective -fold
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...
Ample vector bundles with sections vanishing along conic fibrations over curves.
Tommaso De Fernex (1998)
Collectanea Mathematica
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Contractions of smooth varieties. II. Computations and applications
Marco Andreatta, Jarosław A. Wiśniewski (1998)
Bollettino dell'Unione Matematica Italiana
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Una contrazione su una varietà proiettiva liscia è data da una mappa propria, suriettiva e a fibre connesse in una varietà irriducibile normale . La contrazione si dice di Fano-Mori se inoltre è -ampio. Nel lavoro, naturale seguito e completamento delle ricerche introdotte in [A-W3], si studiano diversi aspetti delle contrazioni di Fano-Mori attraverso esempi (capitolo 1) e teoremi di struttura (capitoli 3 e 4). Si discutono anche alcune applicazioni allo studio di morfismi birazionali...