發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : On cyclic reduction and finite difference schemes