Figure 6: Compilation of BHMFs predicted by several recent models for SMBH formation and growth. Shown are the BHMFs predicted by Hopkins et al.  (solid black line), Shen  (dotted blue line), Fanidakis et al.  (dashed red line), Di Matteo et al.  (dot-dashed green line), and Volonteri and Begelman  (dashed-dotted-dotted-dotted magenta line). In general the number densities predicted by the models agree to within a factor of a few, although they diverge at . Some of these authors did not report BHMFs at each redshift shown, so we only show those available at each redshift.