Fig. 4.4.
Solutionsto (4.3) for T = 3.9 with a time step of 0.3 (left), 0.15 (middle), and 0.075 (right). Top plots: Yμ and yμ. Bottom plots: Φ and φ. The dotted lines indicate the corresponding exact solutions yμ and φ evaluated on the same time mesh theY as dashed-lined numerical approximations μ and Φ.
