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

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