the distance matrix of the graph. If the parameter is empty the distance matrix will be calculated within the function.
log
if TRUE it returns the log of the product. The default
value is FALSE.
Value
References
H. P. Schultz, E. B. Schultz, and T. P. Schultz, Topological Organic Chemistry. 4. Graph Theory, Matrix
Permanents, and Topological Indices of Alkanes, Journal of Chemical Information and Computer Sciences,
vol. 32, no. 1, pp. 69-72, 1992.