
handle: 20.500.12395/31898
In this paper, we present some inequalities for the Co-PI index involving the some topological indices, the number of vertices and edges, and the maximum degree. After that, we give a result for trees. In addition, we give some inequalities for the largest eigenvalue of the Co-PI matrix of G.
Co-PI matrix, Co-PI index, Co-PI spectral radius
Co-PI matrix, Co-PI index, Co-PI spectral radius
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