Now showing items 16-35 of 54

    • Estimation of the yield curve for Costa Rica using metaheuristic optimization 

      Quirós Granados, Andrés; Trejos Zelaya, Javier (2017-06-30)
      The term structure of interest rates or yield curve is a function relating the interest rate with its own term. Nonlinear regression models of Nelson-Siegel and Svensson were used to estimate the yield curve using a sample ...
    • Faltings heights of CM elliptic curves and special Gamma values 

      Barquero Sánchez, Adrián Alberto; Cadwallader, Lindsay; Cannon, Olivia; Genao, Tyler; Masri, Riad (2017-12)
      In this paper, we evaluate the Faltings height of an elliptic curve with complex multiplication by an order in an imaginary quadratic field in terms of Euler’s Gamma function at rational arguments.
    • Geometrical correlation indices using homological constructions on manifolds 

      Solís Chacón, Maikol; Hernández Alvarado, Alberto José; Zúñiga Rojas, Ronald Alberto (2018)
      Abstract The course of dimensionality is a common problem in statistics and data analysis. Variable sensitivity analysis methods are a well studied and established set of tools designed to overcome these sorts of problems. ...
    • La geometría en su contexto histórico 

      Várilly Boyle, Joseph C. (Las Matemáticas y su Enseñanza 6(17):21–34, 1995 octubre, 1995-10-15)
      La geometría en los sistemas de enseñanza media ha sido retomado por diversas propuestas para remozar los programas de matemáticas; y en el caso de Costa Rica, con la puesta en práctica de un programa ambicioso que destaca ...
    • Geometría: II y III ciclo Educación General Básica 

      Rodríguez Alfaro, Analive (Universidad de Costa Rica, Sede de Occidente. San Ramón, Alajuela, C.R., 1993-09)
      Esta es una guía para la enseñanza de temas de geometría elemental, considerados principalmente en los programas del II y III ciclo de Educación General Básica. Se incluyen fichas de laboratorio dirigidas a los educandos, ...
    • Groups with f-generics in NTP2 and PRC fields 

      Montenegro Guzmán, Samaria; Onshuus Niño, Alf; Pierre Sigué, Simon (2018)
      We study groups with f-generic types definable in bounded PRC fields. Along the way, we generalize part of the basic theory of definably amenable NIP groups to NTP2theories and prove variations on Hrushovski’s stabilizer theorem.
    • Los grupos clásicos y su clasificación 

      Várilly Boyle, Joseph C. (Coloquios de Matemática., 2011-08-10)
      Esta es la memoria de un coloquio en la Escuela de Matemática, el 10 de agosto del 2011, en la ocasión de la visita a la UCR del Profesor Luis Joaquín Boya, de Zaragoza. Es un bosquejo de la clasificación de los grupos ...
    • Heat content estimates over sets of finite perimeter 

      Acuña Valverde, Luis Guillermo (2016-09)
      This paper studies by means of standard analytic tools the small time behavior of the heat content over a bounded Lebesgue measurable set of finite perimeter by working with the set covariance function and by imposing ...
    • Imaginaries, invariant types and pseudo p-adically closed fields 

      Montenegro Guzmán, Samaria; Rideau Kikuchi, Silvain (2019-04-29)
      In this paper, we give a general criterion for elimination of imaginaries using an abstract independence relation. We also study germs of definable functions at certain well-behaved invariant types. Finally we apply these ...
    • Improved Automatic Centerline Tracing for Dendritic and Axonal Structures 

      Jiménez López, David Adrián; Labate, Demetrio; Kakadiaris, loannis A.; Papadakis, Manos (2015-04)
      Centerline tracing in dendritic structures acquired from confocal images of neurons is an essential tool for the construction of geometrical representations of a neuronal network from its coarse scale up to its fine scale ...
    • Isometry groups of borel randomizations 

      Berenstein, Alex; Zamora Calero, Rafael (2018-08)
      We study global dynamical properties of the isometry group of the Borel randomization of a separable complete structure. In particular, we show that if properties such as the Rohklin property, topometric generics, extreme ...
    • Laboratorio de matemática: Fascículo #1 

      Rodríguez Alfaro, Analive (Universidad de Costa Rica. Sede de Occidente, 1992, 1992)
      Este fascículo consiste en una serie de guías para utilizar los modelos didácticos correspondientes a diversos conceptos matemáticos incluidos en los programas de los cursos de la enseñanza primaria y secundaria. Incluye ...
    • Location of the zeros of certain parametric families of functions of generalized Fresnel integral type 

      Lobo Segura, Jaime; Villalobos Arias, Mario (2019)
      In this paper, two parametric families of functions, the so-called Complementary Fresnel Integral and the Lommel type, which are of generalized Fresnel integral type, are considered. We review the problems of existence ...
    • Métodos de particionamiento bimodal y trimodal 

      Castillo Elizondo, William (1999)
    • Obtención de conjuntos aproximados mediante algoritmos genéticos 

      Espinoza, José Luis (Tesis para optar al grado de Magister Scientiae en Computación. ITCR, Cartago, 1999., 1999)
      En términos generales, la teoría de conjuntos aproximados, propuesta por Pawlak, consiste en explorar las particiones asociadas a las relaciones de equivalencia generadas por cada subconjunto de los atributos observados, ...
    • On the approximation of a virtual coarse space for domain decomposition methods in two dimensions 

      Calvo Alpízar, Juan Gabriel (2018)
      A new extension operator for a virtual coarse space is presented which can be used in domain decomposition methods for nodal elliptic problems in two dimensions. In particular, a two-level overlapping Schwarz algorithm is ...
    • On the Colmez conjecture for non-abelian CM fields 

      Barquero Sánchez, Adrián Alberto; Masri, Riad (2018-02-08)
      The Colmez conjecture relates the Faltings height of an abelian variety with complex multiplication by the ring of integers of a CM field E to logarithmic derivatives of Artin L-functions at s=0. In this paper, we prove ...
    • On the one dimensional spectral Heat content for stable processes 

      Acuña Valverde, Luis Guillermo (2016-09)
      This paper provides the second term in the small time asymptotic expansion of the spectral heat content of a rotationally invariant α-stable process, 0 < α ≤ 2, for the bounded interval (a, b). The small time behavior ...