%0 Journal Article %T Some results on characterization of finite group by non commuting graph %A Mohammad Reza Darafsheh %A Pedram Yousefzadeh %J Transactions on Combinatorics %D 2012 %I University of Isfahan %X The non commuting graph of a non-abelian finite group $G$ is defined as follows: its vertex set is $G-Z(G)$ and two distinct vertices $x$ and $y$ are joined by an edge if and only if the commutator of $x$ and $y$ is not the identity. In this paper we prove some new results about this graph. In particular we will give a new proof of theorem 3.24 of [2]. We also prove that if $G_1$, $G_2$, ..., $G_n$ are finite groups such that $Z(G_i)=1$ for $i=1,2,...,n$ and they are characterizable by non commuting graph, then $G_1times ...times G_n$ is characterizable by non commuting graph. %K non commuting graph %K nilpotent groups %K Finite groups %U http://www.combinatorics.ir/?_action=showPDF&article=1180&_ob=0ca13861eb689e095c1f50d1542a1aa7&fileName=full_text.pdf