Proof of a conjecture of Abdollahi-Akbari-Maimani concerning the non-commutative graph of finite groups
2017
The non--commuting graph $\Gamma(G)$ of a non--abelian group $G$ is defined as follows. The vertex set $V(\Gamma(G))$ of $\Gamma(G)$ is $G\setminus Z(G)$ where $Z(G)$ denotes the center of $G$ and two vertices $x$ and $y$ are adjacent if and only if $xy\neq yx$. For non--abelian finite groups $G$ and $H$ it is conjectured that if $\Gamma(G) \cong \Gamma(H)$, then $|G|=|H|$. We prove the conjecture.
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