Numerical Method for Solving Matrix Coefficient Elliptic Equation on Irregular Domains with Sharp-Edged Boundaries

Table 2

Numerical error of the problem with “face” shape.

𝑛𝑥×𝑛𝑦	Error in 𝑢^−	Order
20 × 20	0.016
40 × 40	0.0041	1.97
80 × 80	0.0010	1.97
160 × 160	2.58𝑒−004	2.02