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二分(mg,mf)-图中的(g,f)-因子

禹继国 刘桂真

应用数学2003,Vol.16Issue(1):126-129,4.
应用数学2003,Vol.16Issue(1):126-129,4.

二分(mg,mf)-图中的(g,f)-因子

(g, f) - Factors in Bipartite (mg ,mf ) - Graphs

禹继国 1刘桂真1

作者信息

  • 1. 山东大学数学院,济南,250100
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摘要

Abstract

Let G be bipartite a graph with vertex set V(G)and edge set E(G)let g and f be two positive ingeger-valued functions defined on V(G)such that g(x)≤ f(x).A(g,f)- factor H of G is a spanning subgraph of G satisfying g(x)≤ dH(x)≤ f(x).A graph G is a(g,f)- graph means that G itself is a(g.f)- factor.In this paper sufficient conditions for a bipartite(mg,m f)- graph to have a(g,f)- factor with special properties are given.Therefore the result in[5]is generalized.

关键词

(mg,mf)-图/因子/(g,f)-因子

Key words

(mug ,mf)-graph/Facor/(g,f)-factor

分类

数理科学

引用本文复制引用

禹继国,刘桂真..二分(mg,mf)-图中的(g,f)-因子[J].应用数学,2003,16(1):126-129,4.

基金项目

Supported by NNSF(60172003) (60172003)

NSF of Shandong Province(Z2000A02) (Z2000A02)

应用数学

OA北大核心CSCDCSTPCD

1001-9847

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