Effect of multiplicity of stellar encounters and the diffusion
  coefficients in the uniform stellar medium: no classical divergence ?
  Agekyan lambda-factor that accounts for the effect of multiple distant
encounters with large impact factors is used for the first time to compute the
diffusion coefficients in the velocity space of a stellar system. It is shown
that in this case the cumulative effect - the total contribution of distant
encounters to the change in the velocity of the test star - is finite, and the
logarithmic divergence inherent to the classical description disappears, as
also was earlier noted by Kandrup (1981). At the same time, the formulas for
the diffusion coefficients, as before, contain the logarithm of the ratio of
two independent scale factors that fully characterize the state of the stellar
system: the average interparticle distance and the impact parameter of a close
encounter. However, the physical meaning of this factor is no longer associated
with the classical logarithmic divergence.
