Stellar mass functions of mock galaxies built from the Millennium simulation through the semi-analytical model of De Lucia & Blaizot (2007). The 10 mock realisations correspond to the solid lines (orange and violet for LD and HD regions, respectively), while symbols with error bars show the GSMF of VIPERS in the two environments (the same as Fig. 4). All the mass functions are plotted starting from the completeness limit (ℳ_lim) at that redshift. They are obtained by means of the 1 /V_max method, rescaled to have the same number density ρ_N when integrating Φ (ℳ at ℳ > ℳ_lim.