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

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發送短信 : Real equiangular lines in dimension 18 and the Jacobi identity for complementary subgraphs