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           _    _    _    _      ___      _____   
  ____    | || | || | || | ||   / _ \\   |__  //  
 |    \\  | || | || | || | ||  / //\ \\    / //   
 | [] ||  | \\_/ || | \\_/ || |  ___  ||  / //__  
 |  __//   \____//   \____//  |_||  |_|| /_____|| 
 |_|`-`     `---`     `---`   `-`   `-`  `-----`  
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Text this: Real equiangular lines in dimension 18 and the Jacobi identity for complementary subgraphs