GSMF at z = 0. Observational data are taken from Bernardi et al. (2013) (black solid line). Simulation data are derived considering as stellar mass the sum of all stellar particles bound to the galaxy by Subfind (red triangles), and the same sum restricted to particles within 50 pkpc (green hexagon) and 30 pkpc (blue squares). Error bars are computed assuming Poissonian errors. The simulated GSMF is normalised following Eq. (8). Filled and empty marks represent the mass bins with respectively more than and less than ten galaxies.