發送短信 : Twin chromatic indices of some graphs with maximum degree 3

  ______     ___      ______    ______            
 /_   _//   / _ \\   /_   _//  /_   _//     ___   
 `-| |,-   | / \ ||    | ||     -| ||-     /   || 
   | ||    | \_/ ||   _| ||     _| ||_    | [] || 
   |_||     \___//   /__//     /_____//    \__ || 
   `-`'     `---`    `--`      `-----`      -|_|| 
                                             `-`