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  • 學位論文

完全二分圖的IC-著色

On the IC-colorings of the complete bipartite graphs

指導教授 : 史青林

摘要


令G為一個圖,且f為一個函數,使得G中的每一個頂點都對應至一個正整數。同時定義 ,其中H為G的子圖。如果對於每一個正整數 ,皆存在G的一個連通子圖H,使得f (H) = k,則我們稱f為G的一個〝IC-著色〞。很顯然,對於任意的連通圖G至少存在一個〝IC-著色〞。圖G的〝IC-指數〞定義為M (G) = max { f (G) : f為圖G的一個IC-著色}。如果f是G的一個IC-著色,使得f (G)=M (G),則我們稱f為G的一個〝極大IC-著色〞。在[7]中,E. Salehi等人證明 。在這一篇論文中,我們找出 的IC-指數的上界與下界, 。

關鍵字

極大IC-著色 IC-指數 IC-著色

並列摘要


Let G be a graph and let f be a function which maps V(G) into the set of positive integers. We define for each subgraph H of G. We say f to be an IC-coloring of G if for any integer there is a connected subgraph H of G such that f (H)= k. Clearly, any connected graph G admits an IC-coloring. The IC-index of a graph G, denoted by M (G), is defined to be M (G) = max { f (G) : f is an IC- coloring of G }. If f is an IC-coloring of G such that f (G) = M (G), then we say that f is a maximum IC-coloring of G. In [7], E. Salehi et.al. proved that . In this thesis, we find that .

並列關鍵字

IC-coloring maximum IC-coloring IC-index

參考文獻


[1] R. Alter, J. A. Barnett, “A postage stamp problem”, Amer. Math.
[2] G. Chartrand, Introduction to graph theory, McGraw-Hill Higher Edu-
[4] R. Guy, The Postage Stamp Problem, Unsolved problems in Number
Math. Comput. 69 (2000), pp. 325–337.
Graphs”, Discrete Mathematics, 299(2005), pp. 297–310.

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