The galaxy stellar mass function and its evolution with time show no
  dependence on global environment
  We present the analysis of the galaxy stellar mass function in different
environments at intermediate redshift (0.3<z<0.8) for two mass-limited galaxy
samples. We use the IMACS Cluster Building Survey (ICBS), at masses M_ast
>10^(10.5) M_sun, to study cluster, group, and field galaxies at z=0.3-0.45,
and the ESO Distant Cluster Survey (EDisCS), at masses M_ast > 10^(10.2) M_sun,
to investigate cluster and group galaxies at z=0.4-0.8. Therefore, in our
analysis we include galaxies that are slightly less massive than the Milky Way.
Having excluded the brightest cluster galaxies, we show thatthe shape of the
mass distribution does not seem to depend on global environment. Our two main
results are: (1) Galaxies in the virialized regions of clusters, in groups, and
in the field follow a similar mass distribution. (2) Comparing both ICBS and
EDisCS mass functions to mass functions in the local Universe, we find
evolution from z~0.4-0.6 to z~0.07. The population of low-mass galaxies has
proportionally grown with time with respect to that of massive galaxies. This
evolution is independent of environment -- the same for clusters and the field.
Furthermore, considering only clusters, we find that no differences can be
detected neither within the virialized regions, nor when we compare galaxies
within and outside the virial radius. Subdividing galaxies in terms of color,
in clusters, groups, and field red and blue galaxies are regulated by different
mass functions, but comparing separately the blue and red mass functions in
different environments, no differences are detected in their shape.
