Listar Matemática por título
Mostrando ítems 36-55 de 232
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Analyzing the Measurement Equivalence of a Translated Test in a Statewide Assessment Program
(2016-09)When tests are translated into one or more languages, the question of the equivalence of items across language forms arises. This equivalence can be assessed at the scale level by means of a multiple group confirmatory ... -
Aposteriori error estimation for an augmented mixed-primal method applied to sedimentation–consolidation systems
(2018-08-15)In this paper we develop the aposteriorierror analysis of an augmented mixed-primal finite element method for the 2D and 3D versions of a stationary flow and transport coupled system, typically encountered in sedimentati ... -
Aritmética para maestros: el número, su operatoria y su enseñanza
(1996)Es un manual en el que se desarrolla, de una forma sencilla, una posible introducción del niño preescolar y escolar al campo del número y del cálculo aritmético. Se sugieren actividades que tienen una función didáctica ... -
Asociación entre la introducción de la vacuna contra el COVID-19 y el Índice Mensual de Actividad Económica en Costa Rica
(2023)Este trabajo es un esfuerzo por lograr asociar el comportamiento de la economía de Costa Rica afectada por las restricciones impuestas por la pandemia COVID-19 y la introducción de la vacuna contra el virus causante ... -
Asymptotic expansion of the invariant measure for ballistic random walk in the low disorder regime
(2015)We consider a random walk in random environment in the low disorder regime on Zd. That is, the probability that the random walk jumps from a site x to a nearest neighboring site x+e is given by p(e)+ǫξ(x,e), where p(e) is ... -
Área y multiplicación
(1990)Mostramos que la fórmula “área de un rectángulo de base b y altura h = b.h” surge de las propiedades exigidas al concepto “área de un rectángulo” en la actividad de los colectivos humanos, las que quedaron reflejadas en ... -
Characterization of principal bundles: the commutative case
(2023-10-04)A review of the characterization of principal bundles, through the different properties of the action of a group and its related canonical and translation maps, is presented. The work is divided in three stages: a topological ... -
Characterization of principal bundles: the noncommutative algebraic case
(2024)We review Hopf–Galois extensions, in particular faithfully flat ones, accepted to be the noncommutative algebraic dual of a principal bundle. We also make a short digression into how quantum groups relate to Hopf—Galois ... -
Characterization of two-parameter matrix valued BMO by commutator with the Hilbert Transform
(2018)In this paper, we prove that the space of two parameter matrix-valued BMO functions can be characterized by considering iterated commutators with the Hilbert transform. The upper estimate relies on Petermichl's representation ... -
Clifford Geometry: a Seminar
(1995-12-15)Este documento fue desarrollado durante el seminario de posgrado SP--1313 (Seminario en Matemática A) en 1995; por razones de difusión, fue redactado en inglés. Se trata de una exposición de los aspectos de la geometría ... -
Climate-based descriptive models of dengue fever: The 2002 epidemic in Colima, Mexico
(2006-06)Dengue is a public health problem on the rise in many tropical regions and affects approximately 100 million people every year worldwide. In this paper, the authors retrospectively assess the association between five ... -
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 ... -
Clustering binary data by application of combinatorial optimization heuristics
(2019-08-09)We study clustering methods for binary data, first defining aggregation criteria that measure the compactness of clusters. Five new and original methods are introduced, using neighborhoods and population behavior combinatorial ... -
Clustering via ant colonies: Parameter analysis and improvement of the algorithm
(2020-04-18)An ant colony optimization approach for partitioning a set of objects is proposed. In order to minimize the intra-variance, or within sum-of-squares, of the partitioned classes, we construct ant-like solutions by a ... -
Combinatorics of renormalization as matrix calculus
(2006)We give a simple presentation of the combinatorics of renormalization in perturbative quantum field theory in terms of triangular matrices. The prescription, that may be of calculational value, is derived from first ... -
Comparative analysis of dengue versus chikungunya outbreaks in Costa Rica
(2018-06)For decades, dengue virus has been a cause of major public health concern in Costa Rica, due to its landscape and climatic conditions that favor the circumstances in which the vector, Aedes aegypti, thrives. The emergence ... -
Connes' noncommutative differential geometry and the Standard Model
(1993-11)In this paper, the Connes-Lott approach to the phenomenological Lagrangian of the standard theory of elementary particles is reviewed in detail. The paper is self-contained, in that the necessary foundations in noncommutative ... -
Connes' tangent groupoid and strict quantization
(1999-12)We address one of the open problems in quantization theory recently listed by Rieffel. By developing in detail Connes' tangent groupoid principle and using previous work by Landsman, we show how to construct a strict flabby ... -
Contribuciones al estudio de las métricas en análisis de datos
(2012-10-25)Nos hemos planteado estudiar la dependencia de los resultados al cambiar las métricas para el mtodo de Análisis en Componentes Principales (A.C.P.). En efecto, para este análisis el problema de la escogencia de la distancia ...