Results 11 to 20 of about 5,522,853 (247)

PRIMITIVE SUBGROUPS AND PST-GROUPS [PDF]

Bulletin of the Australian Mathematical Society, 2013
AbstractAll groups considered in this paper are finite. A subgroup $H$ of a group $G$ is called a primitive subgroup if it is a proper subgroup in the intersection of all subgroups of $G$ containing $H$ as a proper subgroup. He et al. [‘A note on primitive subgroups of finite groups’, Commun. Korean Math. Soc.
Ballester-Bolinches, Adolfo, Beidleman, J.C., Esteban Romero, Ramón   +2 more
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Imprimitive permutations in primitive groups [PDF]

Journal of Algebra, 2017
The goal of this paper is to study primitive groups that are contained in the union of maximal (in the symmetric group) imprimitive groups. The study of types of permutations that appear inside primitive groups goes back to the origins of the theory of permutation groups. However, this is another instance of a situation common in mathematics in which a
J. Araújo, J.P. Araújo, P.J. Cameron, T. Dobson, A. Hulpke, P. Lopes   +5 more
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Factorizations of Primitive Permutation Groups [PDF]

Journal of Algebra, 1997
The author gives a complete classification of those finite primitive permutation groups which admit a factorization as a product of a point stabilizer and an automorphic image of it: \(G=G_\omega G^\alpha_\omega\). Using the types given in the O'Nan-Scott theorem the following cases are obtained: (i) If \(G\) is affine then \(G=(E_{2^3}L_3(2))\text{ wr
Barbara Baumeister, Baumeister, Barbara
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Prime order derangements in primitive permutation groups [PDF]

, 2011
Let G be a transitive permutation group on a finite set Ω of size at least 2. An element of G is a derangement if it has no fixed points on Ω. Let r be a prime divisor of |Ω|.
Giudici, M., Giudici, Michael, Robert A. Wilson, Wilson, R.A., Wilson, Robert, Timothy C. Burness, Wilson, Robert A., Burness, Tim C, Burness, Timothy C., Burness, T.C., Michael Giudici   +10 more
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1-Designs Constructed from the Groups $PSL_{2}(81)$ and $PSL_{2}(89)$ [PDF]

Journal of Mahani Mathematical Research, 2022
In this paper, some designs from the primitive permutation representations of the groups $PSL_2(81)$ and $PSL_2(89)$ are constructed using the Key-Moori Method 1. We determine the automorphism groups of all the obtained designs and prove that the groups $
Reza Kahkeshani
doaj   +1 more source

Comparsion of production performance of two genetic groups of turkeys reared in the Semi-intensive system [PDF]

Journal of Central European Agriculture, 2012
Production results were compared for two groups of turkeys reared in semi-intensive system. The material included 40 primitive turkeys of the light type and 40 heavy hybrids of the Big-6 line (commercial flock).
Krzysztof DAMAZIAK, Monika MICHALCZUK, Anna KUREK   +2 more
doaj   +1 more source

Cord Blood Plasma and Placental Mesenchymal Stem Cells-Derived Exosomes Increase Ex Vivo Expansion of Human Cord Blood Hematopoietic Stem Cells While Maintaining Their Stemness

Cells, 2023
Background: Mesenchymal stem cells (MSCs) have been used for ex vivo expansion of umbilical cord blood (UCB) hematopoietic stem cells (HSCs) to maintain their primitive characters and long-term reconstitution abilities during transplantation. Therapeutic
Rasha S. Teleb, Amal Abdul-Hafez, Amira Othman, Ahmed El-Abd Ahmed, Abdelrahman A. Elsaid, Hattan Arif, Ahmed A. Zarea, Mohammed Abdulmageed, Hend Mohamed, Sherif Abdelfattah Ibrahim, Ranga P. Thiruvenkataramani, Tarek Mohamed, Masamitsu Kanada, Burra V. Madhukar, Myrna Gonzalez Arellano, Mohammed M. Sayed, Heba M. Qubaisy, Said A. Omar   +17 more
doaj   +1 more source

The Classification of Extremely Primitive Groups [PDF]

International Mathematics Research Notices, 2021
AbstractDedicated to the memory of Jan Saxl Let $G$ be a finite primitive permutation group on a set $\Omega $ with nontrivial point stabilizer $G_{\alpha }$. We say that $G$ is extremely primitive if $G_{\alpha }$ acts primitively on each of its orbits in $\Omega \setminus \{\alpha \}$.
Burness, Timothy C, Thomas, Adam R
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Topics in computational group theory : primitive permutation groups and matrix group normalisers [PDF]

, 2012
Part I of this thesis presents methods for finding the primitive permutation groups of degree d, where 2500 ≤ d < 4096, using the O'Nan-Scott Theorem and Aschbacher's theorem. Tables of the groups G are given for each O'Nan-Scott class.
Coutts, Hannah Jane
core   +2 more sources

OVERGROUPS OF PRIMITIVE GROUPS [PDF]

Journal of the Australian Mathematical Society, 2009
Abstract We give a qualitative description of the set 𝒪 G (H) of overgroups in G of primitive subgroups H of finite alternating and symmetric groups G, and particularly of the maximal overgroups. We then show that certain weak restrictions on the lattice 𝒪 G (H) impose strong restrictions on H and its overgroup lattice.
openaire   +3 more sources