简介:LetSbelongtoZn-{0}.ThecirculantdigraphDCn(S)isadirectedgraphwithvertexsetZnandareset{(i,i+s):i∈Zn,s∈S},A.AdamconjecturedthatDCn(S)≌DCn(T)ifandonlyifT=uSforsomeunitumodn.InthispaperweprovethattheconjectureistrueifSisaminimalgeneratingsetofZnandthusdeterminethefullautomorphismgroupsofsuchdigraphs.Themethodsweemployarenewandeasytobeunderstood.
简介:(满分100分,90分钟完成)(A)基础知i只达标检测一、选择题(每小题4分,共40分)1.点M(x,,·)的坐标满足”:0,则吖在().(-4)纵轴上(B)横轴上(c)纵轴或横轴上(D)、三象限角f分线IJ2.下列函数中,白变世x的取值范围为r>一!的是().㈡H=,/x+2(引一愚(C),一_圭(D)、=lv/x一2。f2一x3.拖拉机玎始1一作时.油箱中有油24升.如果.-每小时耗油4冲,)jI;幺油销中剩余油世、(升)与ll_作时fq】。(时)之问的函数天糸式是().【1)1:4x一24(0≤^≤6)(B)、:一24+4x(fj)、=24—4_