Abstract
Let \(G=(V,E)\) be a simple graph of order n with m edges and Laplacian eigenvalues \(\mu _1\ge \mu _2\ge \cdots \ge \mu _{n-1}\ge \mu _n=0\). The Kirchhoff index and the Laplacian-energy-like invariant of G are defined as
respectively. The Laplacian energy of the graph G is defined as
In this paper, we present an upper bound on Kf of graphs. Also, we obtain some relations between Kf, LEL and first Zagreb index of G. Finally, we give a relation between LEL and LE of G.
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The authors are much grateful to two anonymous referees for their careful reading and valuable comments on our paper, which have considerably improved the presentation of this paper.
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Communicated by Xueliang Li.
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Das, K.C., Xu, K. On Relation Between Kirchhoff Index, Laplacian-Energy-Like Invariant and Laplacian Energy of Graphs. Bull. Malays. Math. Sci. Soc. 39 (Suppl 1), 59–75 (2016). https://doi.org/10.1007/s40840-015-0280-4
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DOI: https://doi.org/10.1007/s40840-015-0280-4
Keywords
- Graph
- Laplacian spectrum (of graph)
- Spanning tree
- Kirchhoff index
- Laplacian-energy-like invariant
- Laplacian energy