Fig. 2.

Group synchronization in an unweighted complete graph of $N=6$ heterogeneous RvdP oscillators. a Mean value (circle) and standard deviation (error bar); NC no coupling, FSC full state coupling ($c=0.15$), PSC partial state coupling ($c_1=c_2=0.15$), HKB HKB coupling ($a=b=-1,c=0.15$). b Trend over time—coupled and uncoupled scenario; black dashed line no coupling, red solid line full state coupling ($c=0.15$). c Trend over time—comparison among the three couplings; red solid line full state coupling ($c=0.17$), gray solid line partial state coupling ($c_1=c_2=0.17$), light blue solid line HKB coupling ($a=b=-1,c=0.17$)