Use of the Randic Connectivity Index

The first numerical matrix, when the Randid connectivity index is employed, is named the edge-Randi6 matrix and denoted by R. An example of this matrix, obtained from the edge-graphical matrix of T2, is given below. For practical reasons, only the upper triangle of the matrix is shown. 

From this matrix can be derived, for example, the vertex-Randid-Wiener index, obtained by summing the elements of the matrix-triangle. 

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