mathematics curriculum in schools is always a key position and is considered as an essential knowledge. so it is taught in the first years of school curriculum. this knowledge has focused on calculating the initial period. so this part of mathematics play an important role in lives of all people so this knowledge is essential for learning today. in the early years of primary school children, th...

We introduce the notion of uniform number of a graph. The  uniform number of a connected graph $G$ is the least cardinality of a nonempty subset $M$ of the vertex set of $G$ for which the function $f_M: M^crightarrow mathcal{P}(X) - {emptyset}$ defined as $f_M(x) = {D(x, y): y in M}$ is a constant function, where $D(x, y)$ is the detour distance between $x$ and $y$ in $G$ and $mathcal{P}(X)$ ...

in this paper, we introduce a function in order to measure the distancebetween two order intervals of fuzzy numbers, and show that this function isa metric. we investigate some properties of this metric, and finally presentan application. we think that this study could provide a more generalframework for researchers studying on interval analysis, fuzzy analysis andfuzzy decision making.

introduction: aim of current study is determination of optimal number of nurses in the emergency department of shiraz ali asghar hospital. method: current study is an applied study and belongs to operational research (or) studies. the population has been studied in this research, includes records of referred patients to the emergency department of hospital in 2008. sampling was performed in the...

in this paper we introduce the root of a fuzzy number, and we present aniterative method to nd it, numerically. we present an algorithm to generatea sequence that can be converged to n-th root of a fuzzy number.

background: citation metrics and total publications in a field has become the gold standard for rating researchers and viability of a field. hence, stimulating demand for citation has led to a search for useful strategies to improve performance metric index. meanwhile, title, abstract and morphologic qualities of the articles attract researchers to scientific publications. yet, there is relativ...