Text this

Number:

Provider:

CAPTCHA:

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

Please enter what you see:

Text this: A new model for preferential attachment scheme with time-varying parameters