Results 111 to 120 of about 3,182 (219)
Statistics in Medicine, Volume 45, Issue 13-14, June 2026.ABSTRACT With the development of modern technology, richer and more intensive longitudinal data are available for researchers to study more complex model structures. The Mixed‐Effect Location‐Scale Model (MELS) is useful for modeling the variance components in such data.
Brian Ping‐Huan Wu, Donald Hedeker
wiley +1 more source
Product of Conjugacy Classes of the Alternating Group An
مجلة بغداد للعلوم, 2012 For a nonempty subset X of a group G and a positive integer m , the product of X , denoted by Xm ,is the set Xm = That is , Xm is the subset of G formed by considering all possible ordered ...
Baghdad Science Journal
doaj +1 more source
Bayesian Inference for Joint Estimation Models Using Copulas to Handle Endogenous Regressors
Oxford Bulletin of Economics and Statistics, Volume 88, Issue 3, Page 519-534, June 2026.ABSTRACT This study proposes a Bayesian approach for finite‐sample inference of the Gaussian copula endogeneity correction. Extant studies use frequentist inference, build on a priori computed estimates of marginal distributions of explanatory variables, and use bootstrapping to obtain standard errors. The proposed Bayesian approach facilitates precise
Rouven E. Haschka
wiley +1 more source
Combinatorics of conjugacy classes in U_n(F_q) [PDF]
, 2016 A classical conjecture of Graham Higman states that the number of conjugacy classes in U_n(q), the group of upper triangular (nxn)-matrices over F_q, is a polynomial function of q, for all n.
Soffer, Andrew
core
On the cohomology of finite‐dimensional nilpotent groups and Lie rings
Bulletin of the London Mathematical Society, Volume 58, Issue 6, June 2026.Abstract We establish vanishing results for the first cohomology group of nilpotent groups and Lie rings when the submodule of invariants is trivial. Our results are obtained within a model‐theoretic setting, namely for structures that are definable in a finite‐dimensional theory, which encompasses algebraic groups over algebraically closed fields ...
Samuel Zamour
wiley +1 more source
ON CONJUGACY CLASSES IN LINEAR GROUPS
Demonstratio Mathematica, 1993 Let \(G = GL(n,K)\) or \(SL(n,K)\), \(K\) any field (finite or infinite). The author proves that \(| C| > | Z(G)|\) for any non-central conjugacy class \(C\) in \(G\). Combining this with an older result [ibid. 22, 677-693 (1989; Zbl 0696.20040)] the author concludes that \(SL(n,K) = C_ 1C_ 2C\) if \(C\) is any noncentral conjugacy class and \(C_ 1\), \
openaire +2 more sources
Counting conjugacy classes and automorphism-conjugacy classes of ZM-groups
Asian-European Journal of MathematicsIn this paper, we count the number of conjugacy and automorphism-conjugacy classes of elements of a ZM-group. The size of a conjugacy class with respect to these two equivalence relations is also counted.
openaire +2 more sources
Products of conjugacy classes in finite and algebraic simple groups [PDF]
, 2013 We prove the Arad–Herzog conjecture for various families of finite simple groups — if A and B are nontrivial conjugacy classes, then AB is not a conjugacy class.
Malle, Gunter +5 more
core +1 more source
Conjugacy classes and growth conditions
Journal of Algebra, 2003 Let \(G\) be a finitely generated group and \(E\) a finite generating system. If \(g\in G\) let \(l_E(g)\) be the minimal length of an expression of \(g\) as a product of elements of \(E\), and let \(f_E(n)\) be the number of elements \(g\) of \(G\) for which \(l_E(G)\leq n\).
openaire +1 more source
Counting conjugacy classes in Sylow p-subgroups of Chevalley groups [PDF]
, 2007 Let p be a prime and let q be a power of p. Let U(q) be a Sylow p-subgroup of a finite Chevalley group G(q) and let B(q) be the normalizer of U(q) in G(q).
Goodwin, Simon; id_orcid +1 more
core +1 more source