أرسل هذا في رسالة قصيرة: Oscillations and nonoscillations of half-linear difference equations generated by deviating arguments

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