The purpose of this paper is to
classify all perfect groups with cyclic Sylow p-subgroups which satisfy the
condition
(TI) two different Sylow p-subgroups of G contain only the unit element in
common and such that
where P is a Sylow p-subgroup of G.
The main result of this paper is the following
Theorem 1. Let G be a perfect finite group with a cyclic Sylow p-subgroup P of
order pa and assume that the Sylow p-subgroups of G satisfy the (TI) condition.
Assume, furthermore, that
Then one of the following statements holds.
(I) a = 1, G≅PSL(2,p), where p > 3 is a prime.
(II) a = 1, G≅PSL(2,p − 1), where p = 2m + 1 > 5 is a Fermat prime.
(III) a = 1, G≅SL(2,p), where p > 3 is a prime.
(IV) a = 2, p = 3, G≅PSL(2,8).
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