發送短信 : On the coderivative of the projection operator onto the second-order cone

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