a set $wsubseteq v(g)$ is called a resolving set for $g$,
if for each two distinct vertices $u,vin v(g)$ there exists $win w$
such that $d(u,w)neq d(v,w)$, where $d(x,y)$ is the distance
between the vertices $x$ and $y$. the minimum cardinality of a
resolving set for $g$ is called the metric dimension of $g$, and
denoted by $dim(g)$. in this paper, it is proved that in a
connected graph $...