合肥工业大学学报(自然科学版)
閤肥工業大學學報(自然科學版)
합비공업대학학보(자연과학판)
JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE)
2014年
4期
493-497
,共5页
优美图%平衡图%交错图%非连通图
優美圖%平衡圖%交錯圖%非連通圖
우미도%평형도%교착도%비련통도
graceful graph%balanced graph%alternating graph%unconnected graph
文章讨论了非连通图2 Cm ∪ Cn ∪ P2的优美性,证明了如下结论:设k为任意正整数,当m=4 k ,n=8k ,24k ,8k -1;m =12k+4,n =8k+3;m =8k+2,n =32k -8,32k+24;m =8k+6,n =40k+20,24k+28时,2Cm ∪ Cn ∪ P2都是优美图,当k为任意正整数时(k ≥3),非连通图2C4k+2∪ C16k+8∪ P2是优美图,其中 P2是2个顶点的路,Cn是n个顶点的圈。
文章討論瞭非連通圖2 Cm ∪ Cn ∪ P2的優美性,證明瞭如下結論:設k為任意正整數,噹m=4 k ,n=8k ,24k ,8k -1;m =12k+4,n =8k+3;m =8k+2,n =32k -8,32k+24;m =8k+6,n =40k+20,24k+28時,2Cm ∪ Cn ∪ P2都是優美圖,噹k為任意正整數時(k ≥3),非連通圖2C4k+2∪ C16k+8∪ P2是優美圖,其中 P2是2箇頂點的路,Cn是n箇頂點的圈。
문장토론료비련통도2 Cm ∪ Cn ∪ P2적우미성,증명료여하결론:설k위임의정정수,당m=4 k ,n=8k ,24k ,8k -1;m =12k+4,n =8k+3;m =8k+2,n =32k -8,32k+24;m =8k+6,n =40k+20,24k+28시,2Cm ∪ Cn ∪ P2도시우미도,당k위임의정정수시(k ≥3),비련통도2C4k+2∪ C16k+8∪ P2시우미도,기중 P2시2개정점적로,Cn시n개정점적권。
This paper deals with the gracefulness of unconnected graphs 2Cm ∪ Cn∪ P2 .The following results are proved :for positive integers k ,if m=4k ,n=8k ,24k ,8k-1 ;m=12k+4 ,n=8k+3 ;m=8k+2 ,n=32k-8 ,32k+24 ;m=8k+6 ,n=40k+20 ,24k+28 ,the unconnected graphs 2Cm ∪ Cn ∪P2 are graceful graph .For positive integers k(k≥3) ,the unconnected graphs 2C4k+2 ∪ C16k+8 ∪ P2 are graceful graph ,w here P2 is a 2-vertex path ,and Cn is a n-vertex cycle graph .