Fig. 7.
The absolute value of the residuals from the Prony series approximation of the fractional differential equation example Eq. (50) shown in color with α = 0.5, Δ t = 1/2500, Δ x = 1/2500, and (A) 3, (B) 6, (C) 9, or (D) 12 Prony terms in the approximation. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)