Fig. 2.

Travelling front. Instance of a travelling front (blue) for the bump distribution. The threshold is shown in green. The red dot indicates the position $x_0(t)$ where $u(x_0(t),t)=h(x_0(t))$. Equation (9) was truncated after 64 terms per sum. Parameter values are $A=\sqrt{2}$, $B=2$, $\alpha =0.5$, $L=50$, $\kappa =3$, $ϵ=0.05$ and $h_0=0.3$