Figure 6: Mass available for the formation of the seed of a supermassive black hole in the center of pregalactic discs as a function of the mass of the parent dark matter halo (from [14]). The plots refer to the following choice of parameters: , K, , (solid line), (dashed line), and (dotted line). The red curve shows the threshold for fragmentation from (15), with . Halos on the right of the red line give rise to fragmenting discs.