梯子是下整和图  

All Ladders are the Lower Integral Sum Graph

作　　者：高秀莲[1] 

机构地区：[1]德州学院数学系,山东德州253023

出　　处：《滨州学院学报》2007年第6期61-63,共3页Journal of Binzhou University

基　　金：山东省教育科学十一五规划资助项目(115JZ196)

摘　　要：下整和标号与排斥下整和标号是图的新的压缩表示.一个图G称为下整和图,若它同构于某个S Q+的下整和图.图Ln×K2称为梯子.现证明了梯子是下整和图.Lower integral sum labeling and exclusive lower integral sum labeling are ways used as compressed representation of a graph. A graph G is said to be an lower integral sum graph if it is isomorphic to the lower integral sum graph of some Sbelong toQ^＋. Ln ×K2 is called ladder. This paper has proved all ladders are lower integral sum graph.

关 键 词：梯子 下整和数 下整和标号 下整和图 

分 类 号：O157.5[理学—数学]