6533b870fe1ef96bd12cfaba

RESEARCH PRODUCT

Large subgroups of a finite group of even order

Bernhard AmbergLev Kazarin

subject

Discrete mathematicsPure mathematicsFinite groupConjugacy classLocally finite groupApplied MathematicsGeneral MathematicsCharacteristic subgroupCentralizer and normalizerMathematics

description

It is shown that if G G is a group of even order with trivial center such that | G | > 2 | C G ( t ) | 3 |G|>2|C_{G}(t)|^{3} for some involution t ∈ G t\in G , then there exists a proper subgroup H H of G G such that | G | > | H | 2 |G|> |H|^{2} . If | G | > | C G ( t ) | 3 |G|>|C_{G}(t)|^{3} and k ( G ) k(G) is the class number of G G , then | G | ≤ k ( G ) 3 |G|\leq k(G)^{3} .

https://doi.org/10.1090/s0002-9939-2011-10982-1