發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : An exact formulation of the time-ordered exponential using path-sums