發送短信

數:

提供者:

CAPTCHA:

 _    _    _    _    ______     ______    ______  
| |  | || | || | || |      \\  /_   _//  /_   _// 
| |/\| || | || | || |  --  //   -| ||-   `-| |,-  
|  /\  || | \\_/ || |  --  \\   _| ||_     | ||   
|_// \_||  \____//  |______//  /_____//    |_||   
`-`   `-`   `---`   `------`   `-----`     `-`'

Please enter what you see:

發送短信 : On Color Groups of Bravais Colorings of Planar Modules with Quasicrystallographic Symmetries