Fig. 15.

Simulations of Eq. (41) with kinetics given by (50) using parameters FHN2. We plot the distribution of u and grow the domain using staged growth over the timescale $T_g=10T^{\ast }$ where a is before growth at time $T^{\ast }$, b at time $T^{\ast }+T_g$, c at time $T^{\ast }+2T_g$, and d is the final stationary pattern (Color figure online)