أرسل هذا في رسالة قصيرة: Globally exponential stability of a certain neutral differential equation with time-varying delays

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