A subgroup H of a group G is called s-conditionally permutable in G if for every Sylow subgroup T of G there exists an e......

Finite groups in which each cyclic subnormal subgroup is Sylow-permutable,permutable or normal are investigated. Charact......

本文证明了如下定理：设f(z)为非常指数型周期函数，且具有正下级，g(z)为有穷级整函数。若f(z)与g(z)可交换，则g(z)≡f(z)或g(z)≡z。......

In this paper,by studying the domain of selection of the variablesparticipating in variation operations,we prove that Su......