Disjoint directed cycles

被引:37
作者
Alon, N [1 ]
机构
[1] TEL AVIV UNIV,DEPT MATH,RAYMOND & BEVERLY SACKLER FAC EXACT SCI,IL-69978 TEL AVIV,ISRAEL
关键词
D O I
10.1006/jctb.1996.0062
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
It is shown that there exists a positive epsilon SO that for any integer k, every directed graph with minimum outdegree at least k contains at least epsilon k vertex disjoint cycles. On the other hand, for every ii there is a digraph with minimum outdegree k which does not contain two vertex or edge disjoint cycles of the same length. (C) 1996 Academic Press, Inc.
引用
收藏
页码:167 / 178
页数:12
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