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

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發送短信 : On Torsion Free Subgroups of p32 and Related Colored Tilings