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Fórmulas aproximadas del tipo Lévy-Khintchine
Fórmulas aproximadas del tipo Levy-Khintchine
(2009-02-19)
The problem of approximation of the characteristic functions defined by a PII in near intervals is studied. We establish some general properties of these functions and of the associated complex matingales, which, with the ...
A method for analyzing turbulence models
(2009-02-19)
In this article we introduce a concept based on the differential constraints methodto examine the closure procedure in Turbulence Models. We show how this conceptmay be applied to study the problem of interaction and mixing ...
Aplicación del método de selección de propuestas a la descomposición de tareas discretas de optimización de gran complejidad
Aplicación del método de selección de propuestas a la descomposición de tareas discretas de optimización de gran complejidad
(2009-02-20)
In the paper the method of Selection of Proposals and it generalisation, the problemof the organization of structures of conciliating decisions among interrelated systemsare studied. Focuses are offered for the optimal ...
Aproximación fractal para semivariogramas freáticos
Aproximación fractal para semivariogramas freáticos
(2009-02-20)
Hausdorff’s measure is integrated upon, and H¨older’s exponent is obtained as thecodimension DT ? D of the fractal in the Euclidian space in which it is immersed.This has resulted from the application of Daniell’s integral ...
The Determinant of Matching Matrix in the Evaluation of Matching Polynomial
The Determinant of Matching Matrix in the Evaluation of Matching Polynomial
(2011-04-29)
A characterization is given for graphs whose matching polynomial is the determinant of their matching matrices. The matching matrix is then modified and its relation with other graph polynomials is examined.
Some Ornstein-Uhlenbeck potentials for the one-dimensional Schrödinger operator part II: position-dependent drift
Some Ornstein-Uhlenbeck potentials for the one-dimensional Schrödinger operator part II: position-dependent drift
(2009-02-20)
Se considera el operador de Schr¨odinger en el c´?rculo unitario, con un potencial detipo Ornstein – Uhlenbeck, cuyo factor tendencial depende de la posici´on. Se describela distribuci´on del primer valor propio peri´odico, ...
Teoría de nudos geométricos e isotopía poligonal
Teoría de nudos geométricos e isotopía poligonal
(2009-02-19)
The space of n-sided polygons embedded in euclidean three-space consists of a smoothmanifold in which points correspond to piecewise linear or “geometric” knots, while pathscorrespond to isotopies which preserve the geometric ...
Un frailty aditivo en modelos de supervivencia bivariante
Un frailty aditivo en modelos de supervivencia bivariante
(2009-02-18)
Bivariate survival models based on the presence of an unobseved random covariate, grailty, tend to assume a proportional hazard hypothesis. A bivariate survival model is constructed. It is based on frailty model that acts ...
Algoritmos para la clasificación piramidal simbólica
(2009-02-19)
En este artículo se define el concepto de pirámide simbólica, además se presentan dos algoritmos para generar este tipo d pirámide a partir de una matriz de datos simbólicos. El primer algoritmo (CAPS) encuentra un "orden ...
Un enfoque diferente de las técnicas de clustering para el estudio de epidemias
Un enfoque diferente de las técnicas de clustering para el estudio de epidemias
(2009-02-18)
Classification of an outbreak with the category of epidemics requires that some epidemiological and statistical parameters, which have to be studied simultaneously, are satisfied; mathematical theory helps epidemiologists ...