Observation ratio for small network.

<p>The network in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0089231#pone-0089231-g007" target="_blank">Fig. 7</a> was used. Y, V, and V′ respectively denote the network topologies represented in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0089231#pone-0089231-g008" target="_blank">Figs. 8<b>G</b>, 8<b>H</b>, and 8<b>I–J</b></a>. The parameter was set. In each calculation against , all combinations among for all links (specifically, a total of combinations) were tested as initial conditions. The networks such as the ones shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0089231#pone-0089231-g008" target="_blank">Fig. 8<b>K</b> and <b>L</b></a> were also observed but the observation ratios were extremely small, e.g., 0 when , 0.002 when , 0.018 when , and 0.03 when .