Figure 3

(a) 3D plot of exact solution, (b) 3D plot of approximate solution, (c) 3D plot of absolute error function for \(N=3\), \(\mathfrak{h}(t)=t^{2}\), \(\sigma (x, t)=1-0.3 (1+x^{3})e^{-t}\) for Example 6.3