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

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