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arxiv: 1205.1189 · v1 · pith:WTP7SGXUnew · submitted 2012-05-06 · 🧮 math.CO · math.SP

Bounds For The Distance Estrada Index Of Graphs

classification 🧮 math.CO math.SP
keywords distanceestradaindexboundsconnectedgraphbetterd-eigenvalues
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The D-eigenvalues {\mu}_1,{\mu}_2,...,{\mu}_{n} of a connected graph G are the eigenvalues of its distance matrix. The distance Estrada index of G is defined in [15] as DEE=DEE(G)=\Sigma_{i=1}^n e^{{\mu}_{i}} In this paper, we give better lower bounds for the distance Estrada index of any connected graph as well as some relations between DEE(G) and the distance energy.

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