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
来源：
MATHEMATICAL RESEARCH LETTERS | 2016年 / 23卷 / 03期
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.
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页码：771 / 804
页数：34
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