Results 1 to 10 of about 58 (55)

Graph-Theoretic Invariants and the Normal Subgroup Structure of Automorphism Groups A Unified Treatment of Spectral, Chromatic, and Topological Perspectives Mathematics Subject Classification (2020): 05C25, 05C50, 05E18, 20B25, 20E15

open access: yesAl-Farooq Journal of Sciences
 This paper offers a unified, research-level treatment of the interaction between graph-theoretic invariants and the normal subgroup structure of graph automorphism groups. Starting from the classical framework of Frucht, Sabidussi, Whitney and Watkins, we develop the analysis of  as a permutation group through three complementary lenses: (i) the ...
null AMNNAH ABUOJAYLAH ALHADI RASHEED   +1 more
exaly   +2 more sources

Hypermaps Over Non-Abelian Simple Groups and Strongly Symmetric Generating Sets [PDF]

open access: yes, 2023
A generating pair x, y for a group G is said to be symmetric if there exists an automorphism φx,y of G inverting both x and y, that is, xφx,y = x−1 and yφx,y = y−1.
Spiga P., Lucchini A.
core   +1 more source

On Semisymmetric Cubic Graphs of Order 20p2, p Prime

open access: yesDiscussiones Mathematicae Graph Theory, 2021
A simple graph is called semisymmetric if it is regular and edge-transitive but not vertex-transitive. Let p be an arbitrary prime. Folkman proved [Regular line-symmetric graphs, J. Combin. Theory 3 (1967) 215–232] that there is no semisymmetric graph of
Shahsavaran Mohsen   +1 more
doaj   +1 more source

A lattice theoretical interpretation of generalized deep holes of the Leech lattice vertex operator algebra

open access: yesForum of Mathematics, Sigma, 2023
We give a lattice theoretical interpretation of generalized deep holes of the Leech lattice VOA $V_\Lambda $ . We show that a generalized deep hole defines a ‘true’ automorphism invariant deep hole of the Leech lattice. We also show that there is a
Ching Hung Lam, Masahiko Miyamoto
doaj   +1 more source

A question of Frohardt on $2$ -groups, skew translation quadrangles of even order and cyclic STGQs

open access: yesForum of Mathematics, Sigma, 2023
We solve a fundamental question posed in Frohardt’s 1988 paper [6] on finite $2$ -groups with Kantor familes, by showing that finite groups K with a Kantor family $(\mathcal {F},\mathcal {F}^*)$ having distinct members $A, B \in \mathcal
Koen Thas
doaj   +1 more source

RESPONSE OF BREAD WHEAT TO INCREASING. MUSTARD MEAL NITROGEN APPUCATION ON PELLIC VERTISOL AND EUTRIC NITOSOL [PDF]

open access: yes, 2023
Mustard seed meal was evaluated on the field as source of nitrogen for bread wheat on Pellic Vertisol and Eutric Nitosol in a split plot design with three replications.
Tulema, Balesh, Salema, M. P.
core   +2 more sources

Boolean lattices in finite alternating and symmetric groups

open access: yesForum of Mathematics, Sigma, 2020
Given a group G and a subgroup H, we let $\mathcal {O}_G(H)$ denote the lattice of subgroups of G containing H. This article provides a classification of the subgroups H of G such that $\mathcal {O}_{G}(H)$ is Boolean of rank at least
Andrea Lucchini   +3 more
doaj   +1 more source

Pentavalent arc-transitive Cayley graphs on Frobenius groups with soluble vertex stabilizer

open access: yesOpen Mathematics, 2019
A Cayley graph Γ is said to be arc-transitive if its full automorphism group AutΓ is transitive on the arc set of Γ. In this paper we give a characterization of pentavalent arc-transitive Cayley graphs on a class of Frobenius groups with soluble vertex ...
Liu Hailin
doaj   +1 more source

A characterization of the desarguesian planes of order q2 by SL(2, q)

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 6, Issue 3, Page 605-608, 1983., 1983
The main result is that if the translation complement of a translation plane of order q2 contains a group isomorphic to SL(2, q) and if the subgroups of order q are elations (shears), then the plane is Desarguesian. This generalizes earlier work of Walker, who assumed that the kernel of the plane contained GF(q).
D. A. Foulser   +2 more
wiley   +1 more source

Translation planes of even order in which the dimension has only one odd factor

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 3, Issue 4, Page 675-694, 1980., 1980
Let G be an irreducible subgroup of the linear translation complement of a finite translation plane of order qd where q is a power of 2. GF(q) is in the kernel and d = 2sr where r is an odd prime. A prime factor of |G| must divide . One possibility (there are no known examples) is that G has a normal subgroup W which is a W‐group for some prime W.
T. G. Ostrom
wiley   +1 more source

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