Search
Now showing items 1-10 of 310
Estimación no paramétrica de la densidad y de la regresión - previsión no paramétrica
Estimación no paramétrica de la densidad y de la regresión - previsión no paramétrica
(2009-02-18)
We begin with a short wiew of non parametric estimation of density and regression; then we give details and interpretation of a forecasting method, called non parametric forecasting . We show different aspects, technical ...
Ultraproductos de f-anillos proyectables
Ultraproductos de f-anillos proyectables
(2009-02-18)
In [7], Keimel representes the projectable f-rings as continuous sections of Hausdorff sheaves of totally ordered rings. Here, we give a result about the representation of ultraporducts of projectable f-rings in terms of ...
Relations of k-th derivative of dirac delta in hypercone with ultrahyperbolic operator
Relations of k-th derivative of dirac delta in hypercone with ultrahyperbolic operator
(2009-02-18)
In this paper we prove that the generalized functions d (k) (P+) - d (k) (P), d (k) (P-)-d (k) (-P) and d 1 (k) (P)-d 2 (k) (P)d are concentrated in the vertex of the cone P=0 and we find their relationship with the ...
La teoría de respuesta a los itemes: una moderna alternativa para el análisis psicométrico de instrumentos de medición
(2009-02-19)
La Teoría de Respuesta a los Itemes, TRI, (o "Item Response Theory", en inglés) es un enfoque más poderoso que la Teoría Clásica de los Tests para el análisis de calidad técnica de instrumentos de medición psicométricos. ...
A dichotomous property of the total variation of a process with independent increments
(2009-02-19)
We establish a property for the total variation of a cad-lag process with independent increments wich is dichotomous in the sense that only two alternatives are possible. For this purpose we introduce the methods of ...
Casi-ortogonalidad y proximidad en L2 de martingalas pii en casi intervalos
Casi-ortogonalidad y proximidad en L2 de martingalas pii en casi intervalos
(2009-02-18)
It was introduced in [2] the notion of prOcess with independent increments in near-intervals (PII), establishing the existence of a decomposition into components with certain regularity properties. In this work we deepen ...
Algunos aspectos de morfismos K finitos en topos elementales
Algunos aspectos de morfismos K finitos en topos elementales
(2009-02-18)
In this paper we study conditions under which morphims f que va de X a Y, are K-finite in a topos E. We construct some counterexamples.
Algoritmos de punto fijo usando subdivisiones simpliciales
Algoritmos de punto fijo usando subdivisiones simpliciales
(2009-02-18)
In this paper we study an algorithm for approximating fixed points using simplicial subdivisions of the simplex. Furthermore, it is compared with algorithms of primitive sets.
On a variational principle for shape optimization and elliptic free boundary problems
On a variational principle for shape optimization and elliptic free boundary problems
(2009-02-18)
A variational principle for several free boundary value problems using a relaxation approach is presented. The relaxed Energy functional is concave and it is defined on a convex set, so that the minimizing points are ...
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 ...