Results 21 to 30 of about 72,390 (316)

Consistency and asymptotic normality of the maximum likelihood estimator in a zero-inflated generalized Poisson regression [PDF]

open access: yes, 2005
Poisson regression models for count variables have been utilized in many applications. However, in many problems overdispersion and zero-inflation occur.
Min, Aleksey, Czado, Claudia
core   +1 more source

Nonoscillatory solutions of the four-dimensional difference system

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2012
We study asymptotic properties of nonoscillatory solutions for a four-dimensional system \[\begin{aligned} \Delta x_{n}&= C_{n}\, y_{n}^{\frac{1}{\gamma}} \\ \Delta y_{n}&= B_{n}\, z_{n}^{\frac{1}{\beta}} \\ \Delta z_{n}&= A_{n}\, w_{n}^{\frac{1}{\alpha}}
Zuzana Dosla, J. Krejčová
doaj   +1 more source

Asymptotics for Stieltjes polynomials, Padé-type approximants, and Gauss-Kronrod quadrature [PDF]

open access: yes, 2002
23 pages, 1 figure.-- MSC1991 codes: Primary: 41A21, 42C05; Secondary: 30E10.MR#: MR1894475 (2002m:41021)Zbl#: Zbl 1020.41019We study the asymptotic properties of Stieltjes polynomials outside the support of the measure as well as the asymptotic ...
López Lagomasino, Guillermo   +11 more
core   +1 more source

A New Class of Reduced-Bias Generalized Hill Estimators

open access: yesMathematics
The estimation of the extreme value index (EVI) is a crucial task in the field of statistics of extremes, as it provides valuable insights into the tail behavior of a distribution.
Lígia Henriques-Rodrigues   +2 more
doaj   +1 more source

Port-Estimation of a Shape Second-Order Parameter

open access: yesRevstat Statistical Journal, 2014
In this paper we study, under a semi-parametric framework and for heavy right tails, a class of location invariant estimators of a shape second-order parameter, ruling the rate of convergence of the normalised sequence of maximum values to a non ...
Lígia Henriques-Rodrigues   +3 more
doaj   +1 more source

Asymptotic properties of isometries

open access: yesJournal of Mathematical Analysis and Applications, 2002
Let \((X,d_1)\) and \((Y,d_2)\) be metric spaces. If \(I: X\to Y\) satisfies the equation \[ d_2[I(x), I(y)]= d_1(x,y) \] for all \(x,y\in X\), then \(I\) is called an isometry. Following Ulam and Hyers we call a mapping \(f: X\to Y\) an \(\varepsilon\)-isometry if \(f\) satisfies the inequality \[ | d_2[f(x), f(y)]- d_1(x,y)|\leq \varepsilon \] for ...
openaire   +2 more sources

On the Estimation of the Second Order Parameter for Heavy-Tailed Distributions

open access: yesRevstat Statistical Journal, 2013
The extreme-value index γ is an important parameter in extreme-value theory since it controls the first order behavior of the distribution tail. In the literature, numerous estimators of this parameter have been proposed especially in the case of heavy ...
El hadji Deme   +2 more
doaj   +1 more source

Asymptotic Properties of Gaussian Processes

open access: yesThe Annals of Mathematical Statistics, 1972
Abstract : The authors consider two problems for separable mean zero Gaussian processes X(t) with correlation functions rho(t,s) for which 1-rho(t,s) is asymptotic to a regularly varying (at zero) function of /t-s/ with exponent 0=or < alpha =or
Qualls, Clifford, Watanabe, Hisao
openaire   +2 more sources

Asymptotic invariants of lattices in locally compact groups

open access: yesComptes Rendus. Mathématique, 2023
The aim of this work is to understand some of the asymptotic properties of sequences of lattices in a fixed locally compact group. In particular we will study the asymptotic growth of the Betti numbers of the lattices renormalized by the covolume and the
Carderi, Alessandro
doaj   +1 more source

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