Results 231 to 240 of about 379,510 (267)

NORMAL SUBGROUPS OF FUCHSIAN GROUPS

The Quarterly Journal of Mathematics, 1985
It is well-known that all finitely-generated Fuchsian groups contain torsion-free normal subgroups of finite index and the particular case of the (2,3,7)-triangle group has been much studied as the corresponding quotient groups are maximal groups of automorphisms of compact Riemann surfaces.
openaire   +1 more source

NORMAL SUBGROUPS OF FREE CONSTRUCTIONS

Mathematics of the USSR-Sbornik, 1986
Let \({\mathcal G}\) be the smallest class of groups with the following properties: 1) \({\mathcal G}\) contains all cyclic groups, 2) \({\mathcal G}\) is closed with respect to the second order operations in a finite or countable number - taking HNN-extensions with free or cyclic associated subgroups or taking amalgamated free products with free or ...
openaire   +3 more sources

Groups with Restrictions on Normal Subgroups

Algebra and Logic
The paper studies the structure of groups with no elements of order two in which the normal closure of every two-generated subgroup is nilpotent of class at most 3 and establishes that such a group must be nilpotent of class at most \(4\). Additionally, the paper shows that removing the restriction on elements of order two leads to counterexamples.
openaire   +2 more sources

Normal Subgroups of Hecke Groups [PDF]

, 1993
The Hecke group H(λq) is the discrete subgroup of PSL(2,R) generated by R(z) = -1/z and T(z) = z + λq for λq = 2cosπ/q. In this thesis we investigate normal subgroups of these Hecke groups. The most important Hecke group is the modular group obtained for q = 3.
openaire   +1 more source

Normal subgroups

2022
openaire   +1 more source

On the Conjugacy Classes of Cyclic Non-normal Subgroups

Bulletin of the Iranian Mathematical Society, 2021
Hamid Mousavi
exaly  

Classifying and counting fuzzy normal subgroups by a new equivalence relation

Fuzzy Sets and Systems, 2020
Leili Kamali Ardekani, Bijan Davvaz
exaly  

Normalizer Condition and Nilpotent Normal Subgroups

Journal of the London Mathematical Society, 1972
openaire   +1 more source

On distortion of normal subgroups

Geometriae Dedicata, 2020
Hung Cong Tran
exaly  

Cosets of normal subgroups and powers of conjugacy classes

Mathematische Nachrichten, 2021
Antonio Beltran
exaly