發送短信

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

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發送短信 : An Inexact l2-norm Penalty Method for Cardinality Constrained Portfolio Optimization