Figure 3.

Spatiotemporal dynamics of a stable spiral. (a) Greyscale image snapshot of fast variable (V) depicts a spiral wave rotating counterclockwise. (b) Surface plot of snapshot of V with z-axis representing the value of V. (c) Greyscale image of integral of V over one period; the darker regions indicate lower integral values. (d) Surface plot of integral of V over one period. (e) Contour plot of snapshot of V zoomed in at the center of rotation, which is denoted by an asterisk. (f) Trajectories in state space for the four sites on V=V^*=25 contour (horizontal grey line) denoted by numbers 1–4. Since V is the fast variable all trajectories are counterclockwise in state space. (g) Time series of the four sites labeled on (e). The thick vertical gray line indicates the time of snapshot in (e).