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

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發送短信 : Generalization of distributional product of Dirac's delta in hypercone