Estimating the Laplacian Energy-Like Molecular Structure Descriptor
نویسنده
چکیده
where n is the number of vertices of the graph G, and λ1,λ2, . . .,λn are its eigenvalues [1, 4, 5]. Two elementary properties of the graph energy are E(G1 ∪G2) = E(G1) + E(G2) for G1 ∪G2 being the graph consisting of two disconnected components G1 and G2, and E(G∪K1) = E(G), where K1 is the graph with a single vertex. Motivated by the success of the graph-energy concept, and in order to extend it to the Laplacian eigenvalues, the Laplacian energy LE(G) was put forward, defined as [6]
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