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  _____    __   __   __   _    __   __   _    _   
 / ____||  \ \\/ // | || | ||  \ \\/ // | |  | || 
/ //---`'   \ ` //  | '--' ||   \ ` //  | |/\| || 
\ \\___      | ||   | .--. ||    | ||   |  /\  || 
 \_____||    |_||   |_|| |_||    |_||   |_// \_|| 
  `----`     `-`'   `-`  `-`     `-`'   `-`   `-`

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Text this: Closed-form eigenfrequencies in prolate spheroidal conducting cavity