Abstract
For a subgroup of a finite group we introduce a new property called weakly c-normal. Suppose that G is a finite group and H is a subgroup of G. H is said to be weakly c-normal in G if there exists a subnormal subgroup K of G such that $$G=HK$$ and $$H\cap K$$ is s-quasinormally embedded in G. We fix in every non-cyclic Sylow subgroup P of G some subgroup D satisfying $$1<|D|<|P|$$ and study the structure of G under the assumption that every subgroup H of P with $$|H|=|D|$$ is weakly c-normal in G. Some recent results are generalized and unified.
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