Highly Efficient Calculation Schemes of Finite-Element Filter Approach for the Eigenvalue Problem of Electric Field

Table 1

The results on square by Scheme 2 for eigenvalue problem of electric field (𝛾=0): Set ℎ₁=𝐻=√2/8,ℎ₂=ℎ₁/4,ℎ_𝑖=ℎ_𝑖−1/2,𝑖=3,4,….

𝑙	𝜆^ℎ𝑙1	𝜆^ℎ𝑙3	𝜆^ℎ𝑙4
2	1.000000128059	2.000001795837	4.000008182019
3	1.000000008035	2.000000112617	4.000000514003
4	1.000000000503	2.000000007048	4.000000032195
5	1.000000000033	2.000000000442	4.000000002014