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IPM
30
YEARS OLD

“School of Mathematics”

Paper   IPM / M / 748
   School of Mathematics
  Title: A characterization of C2(q) where q > 5
  Author(s):
1 . A. Iranmanesh
2 . B. Khosravi
  Status: Published
  Journal: Comment. Math. Univ. Carolin.
  No.: 1
  Vol.: 43
  Year: 2002
  Pages: 9-21
  Supported by: IPM
  Abstract:
The order of every finite group G can be expressed as a product of coprime positive integers m1,…, mt such that π(mi) is a connected component of the prime graph of G. The integers m1,…, mt are called the order components of G. Some non-abelian simple groups are known to be uniquely determined by their order components. As the main result of this paper, we show that the projective symplectic groups C2(q) where q > 5 are also uniquely determined by their order components. As corollaries of this result, the validities of a conjecture by J.G. Thompson and a conjecture by W. Shi and J. Be for C2(q) with q > 5 are obtained.

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