Distance distribution between cluster Gr50647 and other groups and clusters of different richness (left panels) and the distribution of groups with at least four galaxies in Cartesian coordinates (right panels). The richness limits of groups and clusters are given in the left panels, gr stands for group distributions, ran for the random samples, and b1 and b2 denote the upper and lower 95% bootstrap confidence limits for the group distributions. In the right panels grey empty circles show groups with at least four member galaxies. Black filled circles denote clusters with N_gal ≥ 30 in a distance interval of 90 h^-1 Mpc ≤ D ≤ 140 h^-1 Mpc from Gr50647, and black empty circles those with N_gal ≥ 30 in a distance interval of 200 h^-1 Mpc ≤ D ≤ 250 h^-1 Mpc from Gr50647. The star denotes the location of Gr50647. The positions of the maxima are 119 and 242 h^-1 Mpc (upper left panel, N_gal ≥ 50), and 117 and 219 h^-1 Mpc (lower left panel, N_gal ≥ 30).