Browsing Repositorio Ciencias by Author "Araujo, O"

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The connectivity index of a weighted graph

Araujo, O; de la Pena, JA (1998)

Let G be a simple graph and consider the m-connectivity index (m)chi(G) = Sigma(i1-i2-...-im+1) 1/root d(i1)d(i2)...d(im+1), where i(1) - i(2) - ...- i(m+1) runs over all paths of length m in G and d(i) denotes the degree ...
Some bounds for the connectivity index of a chemical graph

Araujo, O; De la Pena, JA (1998)

Let G be a simple graph. We say that G is a chemical graph if G is connected and the degree d(i) less than or equal to 4 for every vertex i. We consider the connectivity index (1)chi(G) of a chemical graph G. We use some ...

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