STICKLER: NORMAL MODES IN OCEAN ACOUSTICS 



On the other hand, in Figure 10, which is the same case for 

 100 Hz, the proper plus a finite sum of the improper modes is an ex- 

 cellent approximation to the sum of the proper plus the Ewing, 

 Jardesky, Press type branch. 



Dr. Goodman: In this case you have only one proper mode. 

 Isn't that right? 



Dr. Stickler: This case only has one proper mode but it has, 

 of course, an infinity of improper modes. 



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