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

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發送短信 : Verification & discretization of the index theorem for a two dimensional dirac operator