I-Min Yang 



REPLY TO DISCUSSION 



I-Min Yang 



Tetra Teoh 3 Inc. 

 Pasadena, California, U.S.A. 



If you want to have high harmonic or sub harmonic terms, of 

 course you can do it by purely numerical integration. But note that 

 near resonance, the solution is not unique and depends on initial con- 

 ditions. The region of convergence for the peak solution is very nar- 

 row and therefore it is very difficult to obtain the most important re- 

 sults by numerical method. That is the main reason why I developed 

 the approximate method for the harmonic case. 



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