PRIMITIVE LINEAR SERIES ON CURVES

被引:44
|
作者
COPPENS, M
KEEM, C
MARTENS, G
机构
[1] UNIV LEUVEN,B-3030 LOUVAIN,BELGIUM
[2] UNIV ERLANGEN NURNBERG,INST MATH,W-8520 ERLANGEN,GERMANY
[3] SEOUL NATL UNIV,COLL NAT SCI,DEPT MATH,SEOUL 151742,SOUTH KOREA
关键词
D O I
10.1007/BF02567056
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
In this paper we study a new numerical invariant l of curves C which is related to the primitive linear series on C. (Primitive series - defined below - are the essential complete and special linear series on C.) The curves with l less-than-or-equal-to 3 are classified, and it is shown that for a given value of l the curve is a double covering if its genus is sufficiently high. The main tool are dimension theorems of H. Martens-Mumford-type for the varieties of special divisors of C, and we prove two refinements of these theorems.
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页码:237 / 264
页数:28
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