On Fano varieties whose effective divisors are numerically eventually free

被引:2
|
作者
Druel, Stephane [1 ]
机构
[1] Univ Grenoble Alpes, UMR CNRS 5582, Inst Fourier, CS 40700, F-38058 Grenoble 9, France
关键词
ELEMENTARY CONTRACTIONS; EXTREMAL RAYS; MANIFOLDS;
D O I
10.4310/MRL.2016.v23.n3.a11
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
In this paper we classify mildly singular Fano varieties with maximal Picard number whose effective divisors are numerically eventually free. In addition, we prove that if a Del Pezzo surface of degree r admits a finite morphism of degree > 1 onto a Del Pezzo surface of degree s, then either r = s >= 6, or r < s and s >= 8.
引用
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页码:771 / 804
页数:34
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