| تعداد نشریات | 43 |
| تعداد شمارهها | 1,790 |
| تعداد مقالات | 14,606 |
| تعداد مشاهده مقاله | 38,701,911 |
| تعداد دریافت فایل اصل مقاله | 15,064,602 |
Chromatic and clique numbers of a class of perfect graphs | ||
| Transactions on Combinatorics | ||
| مقاله 1، دوره 4، شماره 4، اسفند 2015، صفحه 1-4 اصل مقاله (197.32 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22108/toc.2015.7340 | ||
| نویسنده | ||
| Mohammad Reza Fander* | ||
| Azad University, Chaluse Branch | ||
| چکیده | ||
| Let $p$ be a prime number and $n$ be a positive integer. The graph $G_p(n)$ is a graph with vertex set $[n]=\{1, 2,\ldots, n\}$, in which there is an arc from $u$ to $v$ if and only if $u\neq v$ and $p\nmid u+v$. In this paper it is shown that $G_p(n)$ is a perfect graph. In addition, an explicit formula for the chromatic number of such graph is given. | ||
| کلیدواژهها | ||
| perfect graph؛ Clique number؛ chromatic number | ||
| مراجع | ||
|
R. Diestel (2010) Graph theory Fourth edition, Graduate Texts in Mathematics, Springer Heidelberg 173
S. Hougardy (2006) Classes of perfect graphs Discrete Math. 306, 2529-2571
H. R. Maimani, M. R. Pournaki and S. Yassemi (2010) A class of weakly perfect graphs Czechoslovak Math. J. 60, 1037-1041
| ||
|
آمار تعداد مشاهده مقاله: 7,567 تعداد دریافت فایل اصل مقاله: 3,599 |
||