A note concerning spectral multiplicity one.
A strong law of large numbers for harmonizable isotropic random fields.
A transformation from prediction to past of an -stochastic process
Almost periodic harmonizable processes.
An application of the nonselfadjoint operators theory in the study of stochastic processes.
An Arzela-Ascoli type theorem for random functions.
An elementary property of conditional mathematical expectation. Application to the linear regularity of stochastic processes
Análisis en componentes principales de un proceso estocástico con funciones muestrales escalonadas.
El ACP de un número finito de variables puede ser generalizado para manejar datos que evolucionan en el tiempo. El objetivo de este trabajo es la estimación de los factores principales de procesos aleatorios con funciones muestrales escalonadas. Ante la imposibilidad de obtener una solución exacta a este problema, proponemos estimar el ACP de un proceso de este tipo a partir del ACP del proceso cuyas trayectorias se obtienen como proyección de las originales en el subespacio de las funciones constantes...
Analysis of the Rosenblatt process
We analyze the Rosenblatt process which is a selfsimilar process with stationary increments and which appears as limit in the so-called Non Central Limit Theorem (Dobrushin and Majòr (1979), Taqqu (1979)). This process is non-Gaussian and it lives in the second Wiener chaos. We give its representation as a Wiener-Itô multiple integral with respect to the Brownian motion on a finite interval and we develop a stochastic calculus with respect to it by using both pathwise type calculus and Malliavin...
Approximating a harmonizable isotropic random field.
Approximation of second-order moment processes from local averages.
Associated spectra of some non-stationary processes
Asymptotic expansions of integral functionals of weakly correlated random processes.
Commutative nonstationary stochastic fields
The present paper is devoted to further development of commutative nonstationary field themes; the first studies in this area were performed by K. Kirchev and V. Zolotarev [4, 5]. In this paper a more complicated variant of commutative field with nonstationary rank 2, carrying into more general situation for correlation function is studied. A condition of consistency (see (7) below) for commutative field is placed in the basis of the method proposed in [4, 5] and developed in this paper. The following...
Commuting Nonselfadjoint Operators and their Characteristic Operator-Functions
* Partially supported by Grant MM-428/94 of MESC.In this paper we present some generalizations of results of M. S. Livšic [4,6], concerning regular colligations (A1, A2, H, Φ, E, σ1, σ2, γ, ˜γ) (σ1 > 0) of a pair of commuting nonselfadjoint operators A1, A2 with finite dimensional imaginary parts, their complete characteristic functions and a class Ω(σ1, σ2) of operator-functions W(x1, x2, z): E → E in the case of an inner function W(1, 0, z) of the class Ω(σ1). ...
Covariance structure of wide-sense Markov processes of order k ≥ 1
A notion of a wide-sense Markov process of order k ≥ 1, , is introduced as a direct generalization of Doob’s notion of wide-sense Markov process (of order k=1 in our terminology). A base for investigation of the covariance structure of is the k-dimensional process . The covariance structure of is considered in the general case and in the periodic case. In the general case it is shown that iff is a k-dimensional WM(1) process and iff the covariance function of has the triangular property....
Detección de M señales gaussianas utilizando el desarrollo modificado de un proceso estocástico.
Utilizando el desarrollo modificado de un proceso estocástico se propone una nueva metodología, alternativa a la basada en el desarrollo de Karhunen-Loeve, para el problema de detección de M señales Gaussianas en ruido Gaussiano blanco. Las soluciones proporcionadas no presentan el problema del cálculo de los autovalores y autofunciones asociados a la función de covarianza involucrada y son fácilmente implementables desde el punto de vista práctico.
Dirichlet processes and an intrinsic characterization of renormalized intersection local times
Discrete approximation in the innovation theory of second-order continuous processes.
Hilbert-space of a class of multidimensional stochastic processes