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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

完全C邊混合超圖的著色多項式 / The Chromatic Polynomial of A Mixed Hypergraph with Complete C-edges

吳仕傑 Unknown Date (has links)
在這篇論文中,我們利用分離-收縮法(splitting-contraction algorithm)獲得一個擁有完全C邊以及循環D邊特性的圖之著色多項式。 假如一個混合超圖在點集合上有主要的循環, 使得所有的C邊和D邊包含一個主循環(host cycle)的連接子圖, 則稱此圖為循環的(circular)。 對於每個l≧2, 所有連續l個點會形成一個D邊時, 我們把D記作D_l。 如此一來, 超圖(X,Φ,D_2)就是圖論中n個點的普通循環。 我們先觀察擁有完全C邊和循環D邊的超圖, 利用分離-收縮法的第一步, 找到遞迴關係式並且解它。 然後我們就推廣到一般完全C邊及循環D邊的超圖。 / In this thesis, we obtain the chromatic polynomial of a mixed hypergraph with complete C-edges and circular D-edges by using splitting-contraction algorithm. A mixed hypergraph H=(X,C,D) is called circular if there exists a host cycle on the vertex set X such that every C-edge and every D-edge induces a connected subgraph of the host cycle. For each l≧2, we denote D by D_l if and only if every l consecutive vertices of X form a D-edge. Thus the mixed hypergraph (X,Φ,D_2) is a simple classical cycle on n vertices. We observe first a mixed hypergraph with complete C-edges and D_2. By the first step of the splitting-contraction algorithm, we can find out the recurrence relation and solve it. Then we generalize the mixed hypergraph with complete C-edges and circular D-edges.

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