Mathematics – Group Theory
Scientific paper
2005-09-22
Mathematics
Group Theory
17 pages
Scientific paper
The spectrum $\omega(G)$ of a finite group $G$ is the set of element orders of $G$. If $\Omega$ is a non-empty subset of the set of natural numbers, $h(\Omega)$ stands for the number of isomorphism classes of finite groups $G$ with $\omega(G)=\Omega$ and put $h(G)=h(\omega(G))$. We say that $G$ is recognizable (by spectrum $\omega(G)$) if $h(G)=1$. The group $G$ is almost recognizable (resp. nonrecognizable) if $1
Moghaddamfar A. R.
Shi W. J.
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