Title TOTAL ROMAN {2}-DOMINATING FUNCTIONS IN GRAPHS Type of Research Article Keywords TOTAL ROMAN {2}-DOMINATING FUNCTIONS IN GRAPHS Abstract TOTAL ROMAN {2}-DOMINATING FUNCTIONS IN GRAPHS Researchers Hossein Abdollahzadeh Ahangar (First Researcher)، Mustapha Chellali (Second Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Third Researcher)، Valenzuela-Tripodoro Valenzuela-Tripodoro (Fourth Researcher)