Now showing items 21-31 of 31

    • 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 ...
    • Parallel Sums and Adaptive BDDC Deluxe 

      Widlund, Olof B.; Calvo Alpízar, Juan Gabriel (2017)
      There has recently been a considerable activity in developing adaptive methods for the selection of primal constraints for BDDC algorithms and, in particular, for BDDC deluxe variants. The primal constraints of a BDDC or ...
    • Propuesta didáctica para la docencia universitaria de las ecuaciones polinomiales 

      Camacho Navarro, Catalina; Trejos Zelaya, Javier; Viquez Céspedes, Hernán (2017)
      En este artículo contiene los principales resultados obtenidos a partir del diseño, aplicación y evaluación de una propuesta didáctica para la enseñanza de las ecuaciones polinomiales, la cual se desarrolló durante el mes ...
    • The Chowla-Selberg formula for abelian CM fields and Faltings heights 

      Barquero Sánchez, Adrián Alberto; Masri, Riad (2016-03)
      In this paper we establish a Chowla-Selberg formula for abelian CM fields. This is an identity which relates values of a Hilbert modular function at CM points to values of Euler’s gamma function Γ and an analogous function ...
    • The role of short-term immigration on disease dynamics: An SIR model with age-structure 

      Sánchez Peña, Fabio Ariel; Calvo Alpízar, Juan Gabriel (2019-02-18)
      We formulate an age-structured nonlinear partial differential equation model that features short-term immigration effects in a population. Individuals can immigrate into the population as any of the three stages in the ...
    • Using generalized logistics regression to forecast population infected by Covid-19 

      Villalobos Arias, Mario Alberto (2020-04-05)
      In this work, a proposal to forecast the populations using generalized logistics regression curve fitting is presented. This type of curve is used to study population growth, in this case population of people infected ...
    • Vertical Transmission in a Two-Strain Model of Dengue Fever 

      Murillo, David; Holechek, Susan A.; Murillo, Anarina L.; Sánchez Peña, Fabio Ariel; Castillo Chávez, Carlos (2014)
      The role of vertical transmission in vectors has rarely been addressed in the study of dengue dynamics and control, in part because it was not considered a critical population-level factor. In this paper, we apply the ...
    • Virtual Coarse Spaces for Irregular Subdomain Decompositions 

      Calvo Alpízar, Juan Gabriel (2020-10-25)
      On the other hand, Virtual Element Methods (VEM) [1, 12, 13] allow to handle general polygonal elements. In the case of triangular elements, VEM reduces to the usual FEM. Thus, VEM is a natural choice for constructing space ...
    • XIX Simposio Internacional de Métodos Matemáticos Aplicados a las Ciencias 

      Trejos Zelaya, Javier; Villalobos Arias, Mario Alberto; Barboza Chinchilla, Luis Alberto (2014-05-02)
      El XIX° Simposio Internacional de Métodos Matemáticos Aplicados a las Ciencias (XIX SIMMAC) es el evento de matemática aplicada más importante de América Central. Es organizado por el Centro de Investigación en Matemática ...
    • Zilber's Dichotomy for Differentially Closed Fields with an Automorphism 

      Bustamante Medina, Ronald F. (2020-07-01)
      The theory of difference-differential fields of characteristic zero hasa model-companion denoted byDCFA. In [2] we prove its main properties. In[3] we proved a weak version of Zilber’s dichotomy forDCFA. In this paperwe ...