發送短信 : On nonlinear fractional difference equation with delay and impulses

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