Geodesic
Hyperenergetic and Hypoenergetic Graphs
Zbornik radova, Tome 14 (2011) no. 22, p. 113 .

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

The energy $E=E(G)$ of a graph $G$ is the sum of the absolute values of the eigenvalues of $G$. The motivation for the introduction of this invariant comes from chemistry, where results on $E$ were obtained already in the 1940's. A graph $G$ with $n$ vertices is said to be ``hyperenergetic'' if $E>2n-2$, and to be ``hypoenergetic'' if $E(G)
Classification : 05C50 05C90 92E10
Keywords: energy (of graph), hyperenergetic graph, hypoenergetic graph, spectrum (of graph), chemistry 
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     author = {Ivan Gutman},
     title = {Hyperenergetic and {Hypoenergetic} {Graphs}},
     journal = {Zbornik radova},
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     publisher = {mathdoc},
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     number = {22},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZR_2011_14_22_a4/}
}
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Ivan Gutman. Hyperenergetic and Hypoenergetic Graphs. Zbornik radova, Tome 14 (2011) no. 22, p. 113 . http://geodesic.mathdoc.fr/item/ZR_2011_14_22_a4/