Three parameters plotted in the parameter-parameter planes to show cluster evolution with redshift. Here we plotted C₅₀₈₀ as the concentration parameter. ° = low-z cluster (0.02–0.3); × = high-z cluster (0.3–0.9). The dashed lines represent the boundaries between relaxed and non-relaxed clusters. Boundary values for Gini = 0.65, M₂₀ = −2.0, and concentration = 1.55. R indicates relaxed clusters and N-R indicates non-relaxed clusters.