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

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