A Highly Accurate Regular Domain Collocation Method for Solving Potential Problems in the Irregular Doubly Connected Domains

Table 1

Computational error of regular domain collocation method under different number of nodes in Example 1.

𝑚	𝑛	Absolute error	Relative error
9	15	8.5738×10^−4	4.9203×10^−6
9	21	8.5738×10^−4	4.9203×10^−6
11	15	6.5263×10^−5	3.4685×10^−7
11	21	6.5263×10^−5	3.4685×10^−7
15	15	4.3571×10^−7	2.1605×10^−9
19	15	4.1151×10^−9	1.6389×10^−11
23	15	4.0905×10^−9	7.5697×10^−12
31	15	6.2059×10^−9	1.6639×10^−11