(a) Example of a simple network with directed links between five nodes. (b) Distribution of five nodes from (a) on the PageRank-CheiRank plane , where the size of a node is proportional to the PageRank probability and the color of a node is proportional to the CheiRank probability , with the maximum at gray (red) and the minimum at black (blue). The locations of the nodes of (a) on the plane are (2,4), (1,3), (3,1), (4,2), and (5,5) for the original nodes , and 5, respectively. PageRank and CheiRank vectors are computed from the Google matrices and shown in Fig. 4 at a damping factor .