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OD-Characterization of Some Simple Unitary Groups

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arxiv 1807.07472 v1 pith:5BP3ER6B submitted 2018-07-19 math.GR

M. Akbari , X. Y. Chen , F. Hassani , A. R. Moghaddamfar This is my paper · ORCID
classification math.GR
keywords groupsdegreefinitegroupod-characterizationsimpleunitaryorder
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abstract

The degree pattern of a finite group is the degree sequence of its prime graph in ascending order of vertices. We say that the problem of OD-characterization is solved for a finite group if we determine the number of pairwise nonisomorphic finite groups with the same order and degree pattern as the group under consideration. In this article the problem of OD-characterization is solved for some simple unitary groups. It was shown, in particular, that the simple unitary groups $U_3(q)$ and $U_4(q)$ are OD-characterizable, where $q$ is a prime power $<10^2$.

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