Table 10: The first three eigenvalues for C-F conical beam using NTM in comparison with those of the exact solution presented in [30] and NAT results using the program of [6].

[30]NAT [6] 
NTM 
NTM 
NTM 
NTM 

Time (s)Time (s)Time (s)Time (s)Time (s)

0.26.19646.168366.17061.86.19545.36.196210.56.196332.6
18.385518.251318.251318.380118.384018.3853
39.833639.480939.480939.819439.830039.8336

0.54.62524.61556.24.61751.94.62495.44.625010.94.625134
19.547619.507419.507419.546019.547219.5477
48.578948.472548.472548.574648.577948.5788

0.74.06694.06156.24.06351.94.06685.64.066911.14.067035
20.555420.536020.536120.554720.555320.5554
53.962553.962554.013154.014754.0152