山东师范大学学报(自然科学版)
山東師範大學學報(自然科學版)
산동사범대학학보(자연과학판)
JOURNAL OF SHANGOND NORMAL UNIVERSITY(NATURAL SCIENCE)
2014年
4期
4-5,9
,共3页
[s,t]图%独立数%连通度%Hamilton连通
[s,t]圖%獨立數%連通度%Hamilton連通
[s,t]도%독립수%련통도%Hamilton련통
s,t]graph%number of independent%connectivity%Hamilton connected
若图G的任意个s顶点的导出子图至少有t条边,则称图G为[s,t]图.[s,t]图的概念可视为图的独立数概念的推广.本文证明:若图G是k连通[k+1,2](k≥2)图,则G或者是Hamilton连通的或者同构于Kk∨Gk.由此可以推出,若图G的阶是n(n≥3),α(G)≤κ(G)-1,则G是Hamilton连通的.
若圖G的任意箇s頂點的導齣子圖至少有t條邊,則稱圖G為[s,t]圖.[s,t]圖的概唸可視為圖的獨立數概唸的推廣.本文證明:若圖G是k連通[k+1,2](k≥2)圖,則G或者是Hamilton連通的或者同構于Kk∨Gk.由此可以推齣,若圖G的階是n(n≥3),α(G)≤κ(G)-1,則G是Hamilton連通的.
약도G적임의개s정점적도출자도지소유t조변,칙칭도G위[s,t]도.[s,t]도적개념가시위도적독립수개념적추엄.본문증명:약도G시k련통[k+1,2](k≥2)도,칙G혹자시Hamilton련통적혹자동구우Kk∨Gk.유차가이추출,약도G적계시n(n≥3),α(G)≤κ(G)-1,칙G시Hamilton련통적.
A graph G is a [s,t]graph,if there are at least t edges in every induced by s vertices of G.The conception of [s,t]graph is generalization of independent number.This paper proves that,G either Hamilton connected or isomorphism to Kk∨Gk ,if the connected graph G is k-connected [k+1 ,2 ]graph.The following result can be obtained,let G be a graph of order n≥3,ifα(G)≤κ(G)-1,G is Hamilton connected.