Fig. 9From: Fast–Slow Bursters in the Unfolding of a High Codimension Singularity and the Ultra-slow Transitions of ClassesStable limit cycle of the focus case. We investigated the amplitude (left panel) and frequency (right panel) of the single stable limit cycle present in the focus case. The frequency is measured in Hz. To obtain a flat representation of the spherical surface we make use of Lambert equal area azimuthal projectionBack to article page