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Some lower bounds for Laplacian energy of graphs. (English) Zbl 1227.05184
Summary: The Laplacian energy of a graph $G$ is defined as $LE(G) = \sum^n _{i=1} |\lambda _i - \frac{2m}{n} |$, where $\lambda _1 ( G) \geq \lambda _2 ( G), \dots , \geq \lambda _n ( G) = 0$ are the Laplacian eigenvalues of the graph $G$. Some lower bounds for Laplacian energy of graphs are presented in this note.

MSC:
05C50Graphs and linear algebra
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