Tripartite Ramsey number r t(K 2,3,K 2,3)
A graph G is n - partite, n ≥ 1, if it is possible to partition the set of points V (G) into n subsets V 1 , V 2 , ..., V n (called partite sets) such that every element of the set of lines E(G) joins a point of Vi to a poin...
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| Main Authors: | , |
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| Format: | Journal |
| Published: |
2017
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| Online Access: | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84867285817&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/42748 |
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| Institution: | Chiang Mai University |
| Summary: | A graph G is n - partite, n ≥ 1, if it is possible to partition the set of points V (G) into n subsets V 1 , V 2 , ..., V n (called partite sets) such that every element of the set of lines E(G) joins a point of Vi to a point of V j , i ≠ j. For n = 2, and n = 3 such graphs are called bipartite graph, and tripartite graph respectively. A complete n-partite graph G is an n-partite graph with the added property that if u ∈ V i and v ∈ V j , i ≠ j, then the line uv ∈ E(G). If |V i | = p i , then this graph is denoted by K p1,p2,... ,pn . for the complete tripartite graph K s,s,s with the number of points p = 3s, let each line of the graph has either red or blue color. The smallest number s such that K s,s,s always contains K m,n with all lines of K m,n have one color (red or blue) is called tripartite Ramsey number and denoted by r t (K m,n ,K m,n ). In this paper, we show that rt(K 2,3 ,K 2,3 ) = 5. |
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