Time evolution of a cluster with N = 1000 stars. Each of these stars has an initial radii of R_star = 500R_⊙. Top panel: number of collisions divided by number of stars as a function of time is shown. Middle panel: logarithm of the Lagrangian radii corresponding to 10%, 50%, and 90% of the enclosed mass as a function of time is shown. Bottom panel: mass of the most massive object divided by the initial stellar mass as a function of time is shown. In all panels, the time is normalized by the crossing time of the cluster.