华南师范大学学报(自然科学版)
華南師範大學學報(自然科學版)
화남사범대학학보(자연과학판)
JOURNAL OF SOUTH CHINA NORMAL UNIVERSITY (NATURAL SCIENCE EDITION)
2013年
5期
7-12
,共6页
本原有向图%scrambling指数%缺数段%指数集
本原有嚮圖%scrambling指數%缺數段%指數集
본원유향도%scrambling지수%결수단%지수집
primitive digraph%scrambling index%gaps%index set
设n,q,s是正整数,满足1≤s<q≤n,g.c.d.(q,s)=1,且q+s≥n+1.定义有向图Dn,q,s =(V,E),其中V={1,2,?,n},E={(i,i+1)1≤i≤n-1}∪{(s,1),(n,n-q+1)}.显然,Dn,q,s是本原有向图,且是一类重要的极图.运用了数论和图论的方法得到了Dn,q,s的scrambling 指数,根据本原有向图D的本原指数exp ( D)与scrambling 指数k(D)的已知结论,猜想limn→∞ k(D)exp(D)=12.
設n,q,s是正整數,滿足1≤s<q≤n,g.c.d.(q,s)=1,且q+s≥n+1.定義有嚮圖Dn,q,s =(V,E),其中V={1,2,?,n},E={(i,i+1)1≤i≤n-1}∪{(s,1),(n,n-q+1)}.顯然,Dn,q,s是本原有嚮圖,且是一類重要的極圖.運用瞭數論和圖論的方法得到瞭Dn,q,s的scrambling 指數,根據本原有嚮圖D的本原指數exp ( D)與scrambling 指數k(D)的已知結論,猜想limn→∞ k(D)exp(D)=12.
설n,q,s시정정수,만족1≤s<q≤n,g.c.d.(q,s)=1,차q+s≥n+1.정의유향도Dn,q,s =(V,E),기중V={1,2,?,n},E={(i,i+1)1≤i≤n-1}∪{(s,1),(n,n-q+1)}.현연,Dn,q,s시본원유향도,차시일류중요적겁도.운용료수론화도론적방법득도료Dn,q,s적scrambling 지수,근거본원유향도D적본원지수exp ( D)여scrambling 지수k(D)적이지결론,시상limn→∞ k(D)exp(D)=12.
Let n,q,s be integers,1≤s<q≤n,g.c.d.(q,s)=1,and q+s≥n+1.Define the digraph Dn,q,s =(V, E), where V={1,2,?,n},E={(i,i+1)|1≤i≤n-1}∪{(s,1),(n,n-q+1)}.Obviously, Dn,q,s is a primitive digraph.In fact, Dn,q,s is an important extremal digraph.Scrambling index of Dn,q,s is studied by the method of Number theory and Graph theory .Moreover,based on the results of exponent exp ( D) and scrambling in-dex k( D) of the important primitive digraph D, conjecture lim n→∞k( D) exp( D) =1 2 is proposed .