From: A high accuracy numerical method based on spectral theory of compact operator for biharmonic eigenvalue equations
N
\(\boldsymbol{\lambda_{1}}\)
\(\boldsymbol{\lambda_{2}}\)
\(\boldsymbol{\lambda_{4}}\)
10
104.3631056
452.0074329
1216.451916
15
452.0045101
1216.407600
20