Text this

Number:

Provider:

CAPTCHA:

 _    _      ___     _    _      ___     _    _   
| || | ||   / _ \\  | \  / ||   / _ \\  | || | || 
| || | ||  | / \ || |  \/  ||  / //\ \\ | || | || 
| \\_/ ||  | \_/ || | .  . || |  ___  ||| \\_/ || 
 \____//    \___//  |_|\/|_|| |_||  |_|| \____//  
  `---`     `---`   `-`  `-`  `-`   `-`   `---`

Please enter what you see:

Text this: Existence and stability analysis for fractional impulsive caputo difference-sum equations with periodic boundary condition