Spectral Method with the Tensor-Product Nodal Basis for the Steklov Eigenvalue Problem

Table 2

The eigenvalues of the bilinear finite element.

ℎ	DOF	𝜆1	𝜆2	𝜆4
1/8	81	0.24022930645534	1.49577435506528	2.08269976804992
1/16	289	0.24011662732054	1.49317640860702	2.08266035463158
1/32	1089	0.24008847006616	1.49252179566534	2.08265038681122
1/64	4225	0.24008143153493	1.49235782124229	2.08264788770449
1/128	16641	0.24007967195002	1.49231680754965	2.08264726248054
1/150	22801	0.24007951252139	1.49231309100913	2.08264720582238
1/200	40401	0.24007932566556	1.49230873510836	2.08264713941521
1/256	66049	0.24007923205310	1.49230655286905	2.08264710614529
1/300	90601	0.24007919219220	1.49230562369281	2.08264709197866
1/400	160801	0.24007914547718	1.49230453468660	2.08264707537565
1/512	263169	0.24007912210763	1.49230398913452	2.08264706706984