On Friday, 30th of June, 2017, Dr. Khidir R. Sharaf, a professor at the department of mathematics, faculty of science, University of Zakho participated in the second Malta Conference of Graph Theory and Combinators which was held at Malta University from 26th to 30th of June 2017 with his academic research titled “On the nullity of zero divisor graph of a polynomial ring” The conference was very specialized in the subject with more than 190 top mathematicians in the field. It is worth mentioning that Prof. Sharaf presented his research in one of the panels of the conference, and the audiences were very excited and affected by his constructed methods which he created in order to prove his results, and his research received a high attention of researchers.