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Systèmes doublement orthogonaux de fonctions holomorphes et applications

Thanh Van NguyenAhmed Zeriahi — 1995

Banach Center Publications

0. Introduction. Nous donnons ici une étude systématique des systèmes doublement orthogonaux "de Bergman" et leurs applications à certains aspects de l'analyse pluricomplexe: espaces de fonctions holomorphes, fonctions séparément analytiques. C'est en quelque sorte un article de synthèse. On y trouve cependant des démonstrations détaillées qui n'ont paru nulle part ailleurs.

Multilinear Fourier multipliers with minimal Sobolev regularity, I

Loukas GrafakosHanh Van Nguyen — 2016

Colloquium Mathematicae

We find optimal conditions on m-linear Fourier multipliers that give rise to bounded operators from products of Hardy spaces H p k , 0 < p k 1 , to Lebesgue spaces L p . These conditions are expressed in terms of L²-based Sobolev spaces with sharp indices within the classes of multipliers we consider. Our results extend those obtained in the linear case (m = 1) by Calderón and Torchinsky (1977) and in the bilinear case (m = 2) by Miyachi and Tomita (2013). We also prove a coordinate-type Hörmander integral condition...

Parametric test for change in a parameter occurring in the density of one-parameter exponential family

van Huu Nguyen — 1980

Aplikace matematiky

The problem of testing hypothesis under which the observations are independent, identically distributed against a class of alternatives of regression in a parameter of the one-parameter exponential family is studied. A parametric test for this problem is suggested. The relative efficiency of the parametric test compared to the rank test proposed in the author's preceding paper is also derived.

Prediction problems

Nguyen Van Thu — 1980

CONTENTSIntroduction......................................................................................................................................... 5I. Prediction of strictly stationary random fields.................................................................................... 6II. Prediction of stationary-in-norm fields in Banach spaces of random variables........................ 23 § 1. Banach spaces of random variables...................................................................................

Limit theorems for random fields

Nguyen van Thu — 1981

CONTENTSIntroduction............................................................................................................................................................................ 51. Notation and preliminaries............................................................................................................................................ 52. Statement of the problem..................................................................................................................................................

Boundary value problems and controllability of linear systems with right invertible operators

Nguyen Van Mau — 1992

CONTENTSIntroduction..........................................................................................................................................................5Preliminaries........................................................................................................................................................7   1. Linear spaces and linear operators..............................................................................................................7   2. Right...

The Doob inequality and strong law of large numbers for multidimensional arrays in general Banach spaces

Nguyen Van HuanNguyen Van Quang — 2012

Kybernetika

We establish the Doob inequality for martingale difference arrays and provide a sufficient condition so that the strong law of large numbers would hold for an arbitrary array of random elements without imposing any geometric condition on the Banach space. Some corollaries are derived from the main results, they are more general than some well-known ones.

Estimation and prediction in regression models with random explanatory variables

Nguyen Bac-Van — 1992

The regression model X(t),Y(t);t=1,...,n with random explanatory variable X is transformed by prescribing a partition S 1 , . . . , S k of the given domain S of X-values and specifying X ( 1 ) , . . . , X ( n ) S i = X i 1 , . . . , X i α ( i ) , i = 1 , . . . , k . Through the conditioning α ( i ) = a ( i ) , i = 1 , . . . , k , X i 1 , . . . , X i α ( i ) ; i = 1 , . . . , k = x 11 , . . . , x k a ( k ) the initial model with i.i.d. pairs (X(t),Y(t)),t=1,...,n, becomes a conditional fixed-design ( x 11 , . . . , x k a ( k ) ) model Y i j , i = 1 , . . . , k ; j = 1 , . . . , a ( i ) where the response variables Y i j are independent and distributed according to the mixed conditional distribution Q ( · , x i j ) of Y given X at the observed value x i j .Afterwards, we investigate the case ( Q ) E ( Y ' | x ) = i = 1 k b i ( x ) θ i I S i ( x ) , ( Q ) D ( Y | x ) = i = 1 k d i ( x ) Σ i I S i ( x ) which arises when...

Consistency of least squares estimates in a system of linear correlation models

Nguyen Bac-Van — 2001

We consider a system of linear response models with random explanatory variables in which the global matrix parameter is subject to arbitrary constraints. A generalized least squares estimate (GLSE) of the global parameter is defined by its property of minimizing some norm of the global residual over an affine manifold, called the support, containing the global parameter range. The crucial relation is the one between the true global parameter value and the so-called global mean square (msq) regression...

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