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

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發送短信 : Gröbner Basis with applications