Time evolution of galaxy separations for three different sets of initial conditions at t = 9.2 (today): the continuous lines in panels a1, a2, and a3 refer to the results of test-particle simulations for C = 1.0; panels b1, b2, and b3 are for the same initial conditions but for C = 0.88. Crosses in each panel indicate galaxy separations resulting from N-body simulations with the same initial conditions as test-particle simulations.