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

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發送短信 : On Stone's representation theorem