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Paper   IPM / M / 17794
School of Mathematics
  Title:   Characterizing some finite groups by average order
  Author(s):  Zeinab Akhlaghi (Joint with Beh. Khosravi and A. Zarezadeh)
  Status:   Published
  Journal: Quaestiones Math.
  Vol.:  112
  Year:  2024
  Pages:   1-12
  Supported by:  IPM
  Abstract:
The average order of a finite group G is denoted by o(G). In this note, we classify groups whose average orders are less than o(S4), where S4 is the symmetric group on four elements. Moreover, we prove that G â?? S4 if and only if o(G) = o(S4). As a consequence of our results we give a characterization for some finite groups by the average order. In [9, Theorem 1.2], the groups whose average orders are less than o(A4) are classified. It is worth mentioning that to get our results we avoid using the main theorems of [9] and our results leads to reprove those theorems.

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