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Skew Chromatic Index of Theta Graphs

S. Rajakumari,Joice Punitha M.

Published in:   Vol. 8 Issue 1 Date of Publication:   December 2019
Page(s):   29-33 Publisher:   Integrated Intelligent Research (IIR)
DOI:   10.20894/IJCOA.101.008.001.009 SAI : 2017SCIA316F0922

A two edge coloring of a graph G is said be a skew edge coloring if no two edges of G are assigned the same unordered pair of colors. The least number of colors required for a skew edge coloring of G is called its skew chromatic index denoted by s(G). This article provides a method for skew edge coloring of uniform theta and quasi-uniform theta graphs as two component colorings by defining two mappings f and g from the edge set E(G) to the set of colors {1, 2, 3, �, k}. The minimum number of colors k which is known as the skew chromatic index is determined depending upon the number of edges of G. This work also proves that the bound on the skew chromatic index is sharp for the family of graphs considered for skew edge coloring.