Effective bounds for semipositive sheaves and for the height of points on curves over complex function fields
Hélène Esnault, Eckart Viehweg (1990)
Compositio Mathematica
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Hélène Esnault, Eckart Viehweg (1990)
Compositio Mathematica
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George R. Kempf (1985)
Compositio Mathematica
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Edoardo Ballico, Jarosław A. Wisniewski (1996)
Compositio Mathematica
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Kiyohiko Takeuchi (1989)
Compositio Mathematica
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Edoardo Ballico (1981)
Bulletin de la Société Mathématique de France
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Joseph Cutrone, Nicholas Marshburn (2013)
Open Mathematics
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In this paper, examples of type II Sarkisov links between smooth complex projective Fano threefolds with Picard number one are provided. To show examples of these links, we study smooth weak Fano threefolds X with Picard number two and with a divisorial extremal ray. We assume that the pluri-anticanonical morphism of X contracts only a finite number of curves. The numerical classification of these particular smooth weak Fano threefolds is completed and the geometric existence of some...
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...
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.