Text this

Number:

Provider:

CAPTCHA:

 ______     _____    _    _      ___              
|      \\  |  ___|| | \  / ||   / _ \\    ____    
|  --  //  | ||__   |  \/  ||  / //\ \\  |    \\  
|  --  \\  | ||__   | .  . || |  ___  || | [] ||  
|______//  |_____|| |_|\/|_|| |_||  |_|| |  __//  
`------`   `-----`  `-`  `-`  `-`   `-`  |_|`-`   
                                         `-`

Please enter what you see:

Text this: On Laplacian centrality of a graph: An exposition