μn=0 be its Laplacian eigenvalues. The Kirchhoff index and Laplacian-energy-like invariant (LEL) of graph G are defined as Kf(G)=nΣi=1n-11/μi and LEL(G)=Σi=1n-1 √μi, respectively. In this paper we consider relationship between Kf(G) and LEL(G).]]>
,respectively. In this paper, we compute all eigenvalues of Cay(G,T), where G \in X and T is minimal, second minimal, maximal or second maximal normal subset of G\{e} with respect to its size. In the case that S is a minimal normal subset of G\{e}, the summation of the absolute value of eigenvalues, energy of the Cayley graph, are evaluated.]]>