發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : On the dual pairs (O(p, q), SL(2, ℝ)), (U(p,q), U(1, 1)) and (Sp(p, q), O*(4))