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Published online by Cambridge University Press: 09 February 2022
Let $\pi $ be a set of primes. We say that a group G satisfies $D_{\pi }$ if G possesses a Hall $\pi $ -subgroup H and every $\pi $ -subgroup of G is contained in a conjugate of H. We give a new $D_{\pi }$ -criterion following Wielandt’s idea, which is a generalisation of Wielandt’s and Rusakov’s results.
The first author’s research was sponsored by the Young Scientists Fund of the NSFC (12001359) and the Shanghai Sailing Program (20YF1413400). The second author’s research was partially supported by the National Natural Science Foundation of China (12171302).