發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : The dimension of the join of two graphs