Evolution of three surviving cores in a protoplanetary disk with ﹩r=100﹩ m, ﹩\alpha =3\times 10^{-5}﹩, and ﹩\Sigma _{\mathrm{solid}\,}=6﹩ g cm⁻² at 5 AU. Growth is calculated using the model described in § 3. Upper panel: Distance from the star. Arrows show when each core opens a gap in the disk. Lower panel: Core masses.