Results 11 to 20 of about 10,433 (250)
Structure of intersection graphs
Indonesian Journal of Combinatorics, 2021 Let G be a finite group and let N be a fixed normal subgroup of G. In this paper, a new kind of graph on G, namely the intersection graph is defined and studied.
Haval M. Mohammed Salih +1 more
doaj +1 more source
Subgroups of Infinite Symmetric Groups
Journal of the London Mathematical Society, 1990 Various questions are discussed on the subgroup structure of \(S:=Sym(\Omega)\), where \(\Omega\) is an infinite set. It is shown that S is not the union of a chain of size \(| \Omega |\) of proper subgroups, and results are obtained on the size of the smallest families of proper subgroups with set-theoretic union S.
Macpherson, H, Neumann, P
openaire +2 more sources
On the lattice of pronormal subgroups of dicyclic, alternating and symmetric groups [PDF]
Mathematica BohemicaIn this paper, the structures of collection of pronormal subgroups of dicyclic, symmetric and alternating groups $G$ are studied in respect of formation of lattices ${\rm L}(G)$ and sublattices of ${\rm L}(G)$.
Shrawani Mitkari, Vilas Kharat
doaj +1 more source
Maximal Subgroups of Symmetric Groups
Journal of Combinatorial Theory, Series A, 1996 The purpose of this paper is to give estimates on the number of conjugacy classes of maximal subgroups of the finite symmetric groups \(S_n\), on \(n\) letters in terms of \(n\). It is shown that this number is of the form \((\frac12+o(1))n\). The main work has to be done in establishing that \(S_n\) has at most \(n^{6/11+o(1)}\) conjugacy classes of ...
Liebeck, Martin W., Shalev, Aner
openaire +1 more source
Collineation group as a subgroup of the symmetric group [PDF]
Open Mathematics, 2013 AbstractLet ψ be the projectivization (i.e., the set of one-dimensional vector subspaces) of a vector space of dimension ≥ 3 over a field. Let H be a closed (in the pointwise convergence topology) subgroup of the permutation group $\mathfrak{S}_\psi $ of the set ψ.
Bogomolov Fedor, Rovinsky Marat
openaire +4 more sources
Акушерство, гинекология и репродукция, 2021 Introduction. Multifetal pregnancy is associated with an increased risk of perinatal morbidity and mortality. Type of placentation and discordant fetal growth may be risk factors of adverse pregnancy outcomes.Aim: to compare an impact of dichorionic and ...
K. V. Kostyukov +2 more
doaj +1 more source
Maximal subgroups of symmetric groups [PDF]
Transactions of the American Mathematical Society, 1966 The cardinality of M shall be denoted by I MI. The support of s e S(M) is defined by spts={xeM:s(x)#x}. The fixed set of s=fs s={xeM:s(x)=x} = M-s spts.IfIMI = X > d,d < Y < X +,defineS(X,Y) ={scES(M): I spts |< Y}. The alternating subgroup shall be denoted A(X).
openaire +1 more source
Modular orbits at higher genus
Journal of High Energy Physics, 2020 We extend the modular orbits method of constructing a two-dimensional orbifold conformal field theory to higher genus Riemann surfaces. We find that partition functions on surfaces of arbitrary genus can be constructed by a straightforward generalization
Daniel Robbins, Thomas Vandermeulen
doaj +1 more source
Maximal subgroups of infinite symmetric groups.
Notre Dame Journal of Formal Logic, 1992 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Baumgartner, James E. +2 more
openaire +3 more sources
Heart Rhythm O2, 2020 Background: Life-threatening arrhythmias resulting from genetic mutations are often missed in current electrocardiogram (ECG) analysis. We combined a new method for ECG analysis that uses all the waveform data with machine learning to improve detection ...
Esther Bonet-Luz, MMath, PhD +6 more
doaj +1 more source