i was glancing at the proceedings of the 3rd national meeting of iranian association of medical editors of december 2010, few points took my attention worth mentioning. of the 173 medical science journals of iran only 54 are registered in the scopus database.1   at this gathering all the talks had been focused on the improvement of the quality and impact factors (if) which is the score that the...

in the reign of shāh ismā‘īl i, the position-holder wakīl-i nafs-i nafīs-i humāyūn would serve as the regent (nāyib al-salṭana). after six months that this position was held by one of the elites who was a qizilbash turk, shāh ismā‘īl handed it over to a non-turk and continued the same procedure to the end of his life. the present article is mainly intended to study the social origin of the wakī...

Continuing the work K. C. Das, I. Gutman, B. Furtula, On second geometric-arithmetic index of graphs, Iran. J. Math Chem., 1(2) (2010) 17-28, in this paper we present lower and upper bounds on the third geometric-arithmetic index GA3 and characterize the extremal graphs. Moreover, we give Nordhaus-Gaddum-type result for GA3.

In this paper‎, ‎we give a complete proof of Theorem 4.1(ii) and a new‎ ‎elementary proof of Theorem 4.1(i) in [Li and Shen‎, ‎On the‎ ‎intersection of the normalizers of the derived subgroups of all‎ ‎subgroups of a finite group‎, ‎ J‎. ‎Algebra, ‎323  (2010) 1349--1357]‎. ‎In addition‎, ‎we also give a generalization of Baer's Theorem‎.

Let $R$ be a prime ring, $I$ be any nonzero ideal of $R$ and $f:Irightarrow R$ be an additivemap. Then skew-Engel condition $langle... langle langle$$f(x),x^{n_1} rangle,x^{n_2} rangle ,...,x^{n_k} rangle=0$ implies that $f (x)=0$ $forall,xin I$ provided $2neq$ char $(R)>n_1+n_2+...+n_k, $ where $n_1,n_2,...,n_k$ are natural numbers. This extends some existing results. In the end, we also gener...