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

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發送短信 : A note on the monotonicity of the ES algorithm