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