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))