Listar Revista de Matemática: Teoría y Aplicaciones por título
Mostrando ítems 67-86 de 319
-
Caracterización de espacios de Banach mediante desigualdades y el mapeo de dualidad
(2009-02-25)Using a result of C. E. Chidume, we present a shorter and improved proof of aresult of Xu and Roach on characterization of uniformly convex and uniformly smoothBanach spaces by the duality map and inequalities involving ... -
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 ... -
Challenges for statistics teaching and teacher’s training in Mexico
(2013-08-29)This work will cover the problems that are found in teacher training and professional development in Probability and Statistics in higher education in Mexico. It will be approached through four focuses: a) the characterization ... -
Circular chains of chinese dice
(2010-04-16)In this paper we study Chinese dice, mathematical objects similar to ordinary dice but allowing repetition among their face values.We say that a die A is preferred over a die B (written A B) if A wins more frequently ... -
Clasificacion automática simbólica por medio de algoritmos genéticos
(2010-04-09)This paper presents a variant in the methods for clustering: a genetic algorithm forclustering through the tools of symbolic data analysis. Their implementation avoidsthe troubles of clustering classical methods: local ... -
Climate-Driven Statistical Models as Effective Predictors of Local Dengue Incidence in Costa Rica: A Generalized Additive Model and Random Forest Approach
(2019-12)Climate has been an important factor in shaping the distribution and incidence of dengue cases in tropical and subtropical countries. In CostaRica, a tropical country with distinctive micro-climates, dengue has been endemic ... -
Co-occurrence Matrix and fractal dimension for image segmentation
(2012-03-08)One of the most important tasks in image processing problem and machine vision is object recognition, and the success of many proposed methods relies on a suitable choice of algorithm for the segmentation of an image. This ... -
Cognitive rhythms and evolutionary algorithms in university timetables scheduling
(2015-03-18)The main purpose of this research is to design a methodology based on evolutionary algorithms to university timetable scheduling. This methodology will consider the students’ cognitive rhythms, which establish that teaching ... -
¿Como Trabajan las Calculadoras?
(2012-03-22)What happens when you press the sine key on your calculator? How does a calculator quickly produce the values of trigonometric functions? For instance, how does the TI-89 calculate sin 1.0? You might be surprised to know ... -
Comparative analysis of the orbital structure for non–cuspy and cuspy triaxial models of galaxies using different expansions of the gravitational potential
(2013-08-29)One way to create models of elliptical galaxies is to start from a system of particles with a suitable distribution and to follow its evolution with an N-body code until it reaches equilibrium. In previous works we used ... -
Comparison of Gap Interpolation Methodologies for water Level time Series using perl/pdl
(2012-03-02)Extensive time series of measurements are often essential to evaluate long term changes and averages such as tidal datums and sea level rises. As such, gaps in time series data restrict the type and extent of modeling and ... -
Condiciones generales para la construcción de modelos de ˆb 2 ? LmIND
(2009-02-20)We give general conditions that are sufficient to prove existence of models of ˆb2 ? LmIND inside a special set.Keywords: weak arithmetic, non standard model, complexity classes. -
Conformally invariant differential operators and bilinear functionals in six dimensions
(2009-02-25)We review how to construct the Paneitz operator in dimension four and the correspondingoperator in dimension six, by constructing symmetric bilinear differentialfunctionals that are conformally invariant.Keywords: Conformal ... -
Construction and study of local linearization adaptive codes for ordinary differential equations
(2014-04-03)The aim of this work is to construct adaptive integrators for ordinary differential equations based on the Local Linearization method. Different orders of the involved Padé approximation are considered and their effect ... -
Convergence in nonlinear systems with a forcing term
(2009-02-18)The problem of convergence, as t ® +¥ , of solutions of the system (1) is considered. It is assumed that the functions a , f and g are of class C1 for all values of their arguments, furtermore g' (x) > 0 , f ' (x) ³ r > ... -
Coproductos fibrados de morfismos K-finitos
(2009-02-18)In this paper we study conditions under which the push-out of morphisms K-finite are K-finite, and some related problems. -
Creation of a Model of Pollutans Diffusion in Soil-Water System Using a Cellular Automata
(2011-03-18)In this paper is presented a developed model for a pollutant diffusion in a soil-water system, for specific conditions in a real study area. A model that allows the observations of the pollutant flow in the soil-water ... -
Curvas ROC y Vecinos Cercanos, Propuesta de un Nuevo Algoritmo de Condensación
(2011-03-18)k-NN criteria are non parametric methods of statistical classificaction. They are accurate, versatile and distribution free. However, their computational cost may be too expensive; especially for large sample sizes. We ... -
De la fórmula de sumación de Poisson a los teoremas de muestreo y reconstrucción
(2012-03-22)Los radioastrónomos miden la visibilidad de una fuente luminosa para determinar la cantidad de luz emitida y su distribución, bajo el principio que esta es la transformada de Fourier de la visibilidad. En la teoría de la ... -
Definición de semiproductos escalares útiles en análisis de datos
(2009-02-20)We develop the theory necessary for Data Analysis with inner semiproducts, extendingtha classical concepts of inner products usually employed. For this, we usethe basic algebraic definitions of non degenerated bilinear ...