Figure 8.

Effect of phenotypic space dimensionality on viral evolution. Cumulative average number of neighbors of a given viral strain as a function of phenotypic distance r to that strain for ${\overline{f}}_i={10}^{-3}$, $\mu ={10}^{-2}$, $\sigma /d=3\times {10}^{-3}$. The average number of neighbors depends on the dimension of the phenotypic space as $r^D$, where r is the distance and $D=2$ the dimension of phenotypic space (dotted line).