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تسجيل مستخدم جديدCoronae graphs and their $alpha$-eigenvalues
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Let $G_1$ and $G_2$ be two simple connected graphs. The invariant textit{coronal} of graph is used in order to determine the $alpha$-eigenvalues of four different types of graph equations that are $G_1 circ G_2, G_1lozenge G_1$ and the other two`s are $G_1 odot G_2$ and $G_1 circleddash G_2$ which are obtained using the $R$-graph of $G_1$. As an application we construct infinitely many pairs of non-isomorphic $alpha$-Isospectral graph.
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