Figure 1From: Cauchy problem for the Laplace equation in a radially symmetric hollow cylinder Comparisons of exact solution and its approximations at \(\pmb{r=0.2, 0.6, 0.9}\) for Example 1 . The results for \(\varepsilon=0.005\) are (a1)-(c1) and the results for \(\varepsilon=0.05\) are (a2)-(c2).Back to article page