Figure 4From: Cauchy problem for the Laplace equation in a radially symmetric hollow cylinder Comparisons of exact solution and its approximations by using different methods at \(\pmb{r=0.9}\) . The results for Example 1 are (a1) and (a2) with \(\varepsilon=0.005\) and \(\varepsilon=0.05\), respectively. The results for Example 2 are (b1) and (b2) with \(\varepsilon=0.005\) and \(\varepsilon=0.05\), respectively.Back to article page