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

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發送短信 : Cranks and dissections in Ramanujan's lost notebook