發送短信 : Exact Evaluation and Resummation of the Divergent Expansion for the Heisenberg-Euler Lagrangian

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