相关期刊:《Communications in Mathematical Research》《Acta Mathematica Sinica,English Series》《Journal of Mathematical Research with Applications》《Science China Mathematics》更多>>
Let G be a finite group. Let πe(G) be the set of element orders of G and for any subset m of positive integers, and h(m) be the number of isomorphic classes of finite group G satisfying πe...
Project supported by Returned Personnel Foundation of the State Education Commission of China;Natural Science Fund of Jiangsu Province.
A series of work was devoted to investigation of finite groups with the given properties of Sylow subgroups in the recent years.In Ref. [1] it was proved that if the normalizer of any non-unit Sylow subgroup of a fini...
Project supported by the Natural Science Fund of Shanxi Province
All groups considered in this note are finite. Let π be a set of some primes and π′ the complementary set of primes, π(G) denotes the set of primes dividing the order |G| of a group G.
We shall study such a finite group G with π_e(G)={1,p,q ,…. ,r,m }, where π_e(G)denotes the set of orders of elements in G andp, q, …, r are primes. We call the above groupthe EPMO-group. Theorem 1. Let G be a sol...
Project supported by Fok Ying Tung Education Foundation.
W. Feit has ever beautifully proved the following theorem by the abstract group theoretic method.Theorem 1. Let G be an arbitrary finite group with a cyclic Sylow p-subgroup. If there exists a normal subgroup N of G s...
S. Adnan has proved the fallowing theorem: Let G be a finite group. If G has exactly 2 conjugacy classes of maximal subgroups, then G is solvable. We extend the conjugacy classes to isomorphic classes, and further gen...
If G satisfies the permutizer condition, we call G a pc-group; clearly, all the super-solvable groups are pc-groups. It was shown in [1] that pc-groups of odd order were supersolvable. It is easy to verify that the sy...