Figure 1: Different scenarios of the decay of R(t) with different frequency distributions and coupling strength below the critical threshold (K < Kc).
From: Synchronization of phase oscillators with frequency-weighted coupling

(a–c) Uniform distribution
,
. K = 0, 1.6, 1.78, respectively. (d–f) Triangle distribution
,
. K = 0, 2.2, 2.6, respectively. (g–i) Lorentzian distribution
,
. K = 0, 3.7, 3.9, respectively. The red solid lines denote the fitted curves of the envelopes which all satisfy the exponential form eδt.