5 citations · 22 across the 15 of their papers we have counts for
4 papers · 1 filter
Certain Chromatic Sums of Some Cycle Related Graph Classes
N. K. Sudev, K. P. Chithra, Johan Kok
Let be a certain type of proper -colouring of a given graph and denote the number of times a particular colour is…
On Chromatic Zagreb Indices of Certain Graphs
Johan Kok, N. K. Sudev, U. Mary
In this paper we introduce a variation of the well-known Zagreb indices by considering a proper vertex colouring of a graph . The chromatic Zagreb indices are defined in terms o…
A Note on the Tattoo Index of Graphs
Johan Kok, Naduvath Sudev
Consider a network of pipes which have to be cleaned using some cleaning agents, called brushes, assigned to some vertices. The tattooing of a simple connected directed graph $…
Tattooing and the Tattoo Number of Graphs
Johan Kok, Naduvath Sudev
Consider a network of pipes which have to be cleaned using some cleaning agents, called brushes, assigned to some vertices. The minimum number of brushes required for cleaning…