Radio AGN luminosity function at 1.4 GHz at redshifts 0.1 <  z <  6.1. AGN and total luminosity functions of HLAGN are plotted as magenta and green points, respectively. Solid and dashed magenta lines show the fit of the analytic form of the local luminosity function to our AGN luminosity function data for the pure density and pure luminosity evolutions, respectively, with shaded areas indicating 1σ confidence range. The black and red vertical dashed lines show the luminosity corresponding to the 5σ sensitivity at z_min and z_max of the redshift bin, respectively. Results from the literature are also shown, as detailed in the legend.