  The evolution of material points interacting via gravitational force in 3D
space was investigated. At initial moment points with masses of 2.48 Sun masses
are randomly distributed inside a cube with an edge of 5 light-years. The
modeling was conducted at different initial distributions of velocities and
different ratios between potential and kinetic energy of the points. As a
result of modeling the time dependence of velocity distribution function of
points was obtained. Dependence of particles fraction which had evaporated from
initial cluster on time for different initial conditions is obtained. In
particular, it was obtained that the fraction of evaporated particles varies
between 0,45 and 0,63. Mutual diffusion of two classes of particles at
different initial conditions in the case when at initial moment of time both
classes of particles occupy equal parts of cube was investigated. The maximum
Lyapunov exponent of the system with different initial conditions was
calculated. The obtained value weakly depends on the ratio between initial
kinetic and potential energies and amounts approximately 10^-5. Corresponding
time of the particle trajectories divergence turned out to be 40-50 thousand
years.
