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

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發送短信 : Global optimization of fractional programs with applications to engineering and management problems