Glib Atshan W. Department of Mathematics,Collage of Science,AL-Mustansiryah University,Baghdad,Iraq. J. Al-Qadisiyah Comp. Sci. Math. [Internet]. 2017 Oct. 1 [cited 2024 Sep. 19];3(2):222-9. Available from: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/291