أرسل هذا في رسالة قصيرة: Algebraic connections between topological indices

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