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On the Ramsey Numbers for a Combination of Paths and Jahangirs

Kashif Ali1, Edy Tri Baskoro2
1School of Mathematical Sciences, Government College University, 68-B,New Muslim Town, Lahore Pakistan
2Combinatorial Mathematics Research Group, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung Jalan Genesa 10 Bandung 40132, Indonesia,

Abstract

For given graphs \( G \) and \( H \), the Ramsey number \( R(G, H) \) is the least natural number \( n \) such that for every graph \( F \) of order \( n \) the following condition holds: either \( F \) contains \( G \) or the complement of \( F \) contains \( H \). In this paper, we improve the Ramsey number of paths versus Jahangirs. We also determine the Ramsey number \( R(\cup G, H) \), where \( G \) is a path and \( H \) is a Jahangir graph.

Keywords: Ramsey number, path, Jahangir