Figure 5.

Dependence of the mean indices of the “real” relaxation modulus $G\left(t\right)$ (36) optimal approximation by the FMM: (a) relative empirical error $ERR{Q}_{Nrel}$ (39), (b) integral error $ERRQ$ (40) on the number of measurements $N$ and the noises’ standard deviations $\sigma$.