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  / ___// | || | ||  | |/ //  \ \\/ //   ____    
  \___ \\ | || | ||  | ' //    \ ` //   |    \\  
  /    // | \\_/ ||  | . \\     | ||    | [] ||  
 /____//   \____//   |_|\_\\    |_||    |  __//  
`-----`     `---`    `-` --`    `-`'    |_|`-`   
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Text this: Closed-form eigenfrequencies in prolate spheroidal conducting cavity