Title Relating the annihilation number and the Roman domination Type of Research Article Keywords Relating the annihilation number and the Roman domination Abstract Relating the annihilation number and the Roman domination Researchers Hamideh Aram (First Researcher)، Rana Khoeilar (Second Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Third Researcher)، Lutz Volkmann (Fourth Researcher)