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- Sunny Joseph Kalayathankal, G. Suresh Singh
- Mathematics and Computers in Simulation
- 2010

The concept of the Gutman index, denoted Gut(G) was introduced for a connected undirected graph G. In this note we apply the concept to the underlying graphs of the family of Jaco graphs, (directed graphs by definition), and decribe a recursive formula for the Gutman index Gut(J∗ n+1(1)) in terms of the Gutman index of the underlying Jaco graph, J ∗ n (1),… (More)

- Chandoor Susanth, Sunny Joseph Kalayathankal, N. K. Sudev, K. P. Chithra, Johan Kok
- 2015

Given a finite nonempty sequence S of integers, write it as XY k, consisting of a prefix X (which may possibly be empty), followed by k copies of a nonempty string Y . Then, the greatest such integer k is called the curling number of S and is denoted by cn(S). The concept of curling number of sequences has already been extended to the degree sequences of… (More)

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