發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Sigma Chromatic Number of the Middle Graph of Some General Families of Trees of Height 2