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 __   __     ___      _  _     _____             
 \ \\/ //   / _ \\   | \| ||  |  ___||   ____    
  \   //   / //\ \\  |  ' ||  | ||__    |    \\  
  / . \\  |  ___  || | .  ||  | ||__    | [] ||  
 /_//\_\\ |_||  |_|| |_|\_||  |_____||  |  __//  
 `-`  --` `-`   `-`  `-` -`   `-----`   |_|`-`   
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Text this: Nonlinear topological photonics