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

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發送短信 : Hermitian matrices of roots of unity and their characteristic polynomials