A Class of Spectral Element Methods and Its A Priori/A Posteriori Error Estimates for 2nd-Order Elliptic Eigenvalue Problems

Table 5

The Approximate eigenvalues and indicator 𝜓₀ of P-SEM.

𝑁	𝜆𝑁,ℎ	𝜓0
3	28.56900	2.72𝐸+01
4	31.99175	3.49𝐸+00
5	34.82082	2.25𝐸−01
6	34.65087	1.31𝐸−02
7	34.65057	3.32𝐸−03
8	34.64765	1.92𝐸−03
9	34.64567	1.22𝐸−03
10	34.64432	8.11𝐸−04
11	34.64335	5.62𝐸−04
12	34.64265	4.02𝐸−04
13	34.64212	2.95𝐸−04
14	34.64171	2.22𝐸−04
15	34.64139	1.71𝐸−04
16	34.64114	1.33𝐸−04
17	34.64094	1.06𝐸−04
18	34.64078	8.49𝐸−05