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

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發送短信 : A note on sharp 1-dimensional poincaré inequalities