Waves of constant shape and the structure of the “rotors boundary” in excitable media

We classify possible fixed-shaped excitation wave patterns in , in terms of the kinematic approach. These patterns include rotating waves (diverging and converging spiral waves), and translating waves (retracting waves, “critical fingers” and “V-shaped” patterns). We analyse regions of existence of these patterns in the parametric space, and compare the results with those obtained by numerical simulations and with the “free-boundary” approach.