Mechanical Quadrature Method and Splitting Extrapolation for Solving Dirichlet Boundary Integral Equation of Helmholtz Equation on Polygons

Table 2

The condition number.

(𝑛1,𝑛2,𝑛3,𝑛4)	(2^3,2^3,2^3,2^3)	(2^4,2^4,2^4,2^4)	(2^5,2^5,2^5,2^5)
|𝜆min|	2.214𝑒−3	1.059𝑒−3	5.236𝑒−4
|𝜆max|	0.6408	0.6405	0.6404
Cond	2.894𝑒+002	6.047𝑒+002	1.223𝑒+003