Bend in the correlation function: The surviving imprint of adiabatic perturbations

Results are presented from numerical analysis of a two-dimensional simulation of the clustering of collisionless particles. The initial perturbation spectrum ws cut off to simulate damping (as in the adiabatic theory of galaxy formation). The two-point correlation function was driven to a power law at small scales and remained small at large scales during nonlinear ''pancaking.'' There were small (approx.10-1) imprints of large-scale power in the form of bumps in the covariance function. During nonlinear evolution, these bumps were found to cause a downward bend in the correlation function, as observed in sky surveys. If the primordial spectral index was 0 or 1, anticorrelation was found just outside this bend