發送短信 : Positivity and stability analysis for linear implicit difference delay equations

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