| Rank |
Eigenvalue |
Eigenvector - First sheet |
Eigenvector - Second sheet |
Nodal domains - First sheet |
Nodal domains - Second sheet |
| 1 |
4.9348 |
 |
 |
 |
 |
| 2 |
8.3624 |
 |
 |
 |
 |
| 3 |
8.3624 |
 |
 |
 |
 |
| 4 |
12.3369 |
 |
 |
 |
 |
| 5 |
12.3369 |
 |
 |
 |
 |
| 6 |
16.6451 |
 |
 |
 |
 |
| 7 |
16.6451 |
 |
 |
 |
 |
| 8 |
19.7390 |
 |
 |
 |
 |
| 9 |
24.6736 |
 |
 |
 |
 |
| 10 |
24.6736 |
 |
 |
 |
 |
| 11 |
27.9770 |
 |
 |
 |
 |
| 12 |
27.9770 |
 |
 |
 |
 |
| 13 |
30.5113 |
 |
 |
 |
 |
| 14 |
30.5113 |
 |
 |
 |
 |
| 15 |
32.0757 |
 |
 |
 |
 |
| 16 |
32.0757 |
 |
 |
 |
 |
| 17 |
41.9444 |
 |
 |
 |
 |
| 18 |
41.9444 |
 |
 |
 |
 |
| 19 |
42.4354 |
 |
 |
 |
 |
| 20 |
42.4354 |
 |
 |
 |
 |
| 21 |
44.4123 |
 |
 |
 |
 |
| 22 |
46.5739 |
 |
 |
 |
 |
| 23 |
46.5739 |
 |
 |
 |
 |
| 24 |
49.3465 |
 |
 |
 |
 |
| 25 |
49.3465 |
 |
 |
 |
 |
|
| rank |
π2(n2/4+m2/4) |
eigenvalue on the covering |
| 1 |
4.9348 |
4.9348 |
| 2 |
12.3370 |
8.3624 |
| 3 |
12.3370 |
8.3624 |
| 4 |
19.7392 |
12.3369 |
| 5 |
24.6740 |
12.3369 |
| 6 |
24.6740 |
16.6451 |
| 7 |
32.0762 |
16.6451 |
| 8 |
32.0762 |
19.7390 |
| 9 |
41.9458 |
24.6736 |
| 10 |
41.9458 |
24.6736 |
| 11 |
44.4132 |
27.9770 |
| 12 |
49.3480 |
27.9770 |
| 13 |
49.3480 |
30.5113 |
| 14 |
61.6850 |
30.5113 |
| 15 |
61.6850 |
32.0757 |
| 16 |
64.1524 |
32.0757 |
| 17 |
64.1524 |
41.9444 |
| 18 |
71.5546 |
41.9444 |
| 19 |
71.5546 |
42.4354 |
| 20 |
78.9568 |
42.4354 |
|