Now showing items 56-75 of 113

    • 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 ...
    • Ley de grandes números en medio ambiente aleatorio 

      Acuña Larios, Jennifer (2020)
      Las condiciones (T)γ,γ ∈ (0,1) introducidas por Sznitman en 2002 tienen un significante impacto en el estudio de caminatas aleatorias sobre medios aleatorios (RWRE) . Este tipo de caminatas modelan, por ejemplo, el movimiento ...
    • Local divisibility and model completeness of a theory of real closed rings 

      Guier Acosta, Jorge Ignacio (2021-01)
      Let T∗ be the theory of lattice-ordered rings convex in von Neumann regular real closed f-rings, without minimal idempotents (non zero) that are divisible-projectable and sc-regular. I introduce a binary relation describing ...
    • Location of the zeros of certain parametric families of functions of generalized Fresnel integral type 

      Lobo Segura, Jaime; Villalobos Arias, Mario Alberto (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 ...
    • Lyapunov exponents of probability distributions with non-compact support 

      Sánchez Chavarría, Adriana Cristina; Viana, Marcelo (2020)
      A recent result of Bocker–Viana asserts that the Lyapunov exponents of compactly supported probability distributions in GL(2, R) depend continuously on the distribution. We investigate the general, possibly concompact ...
    • Mathematical and Statistical models as tools for the control ofmosquito-borne diseases: The experience of Costa Rica 

      Sánchez Peña, Fabio Ariel; Barboza Chinchilla, Luis Alberto; Vásquez Brenes, Paola Andrea; García Puerta, Yury Elena; Calvo Alpízar, Juan Gabriel; Chou Chen, Shu Wei; Mery, Gustavo (2021-06-25)
      The modeling of infectious diseases provides valuable input in the development of mitigating strategies and implementation of public health interventions. We highlight results and current research conducted in Costa Rica ...
    • Métodos de particionamiento bimodal y trimodal 

      Castillo Elizondo, William (1999)
    • Minimum depth of double cross product extensions 

      Hernández Alvarado, Alberto José (2020)
      In this paper we explore minimum odd and minimum even depth sub- algebra pairs in the context of double cross products of finite dimensional Hopf algebras. We start by defining factorization algebras and outline how subring ...
    • Models of torsors and the fundamental group scheme 

      Antei, Marco; Emsalem, Michel (2018)
      Given a relative faithfully at pointed scheme over the spectrum of a discrete valuation ring X !S, this paper is motivated by the study of the natural morphism from the fundamental group scheme of the generic ber X ...
    • Models of torsors over affine spaces 

      Antei, Marco; Esquivel Araya, Jorge Arturo (2019)
      Let X := A n R be the n-dimensional affine space over a discrete valuation ring R with fraction field K. We prove that any pointed torsor Y over A n K under the action of an affine finite-type group scheme can be extended ...
    • Nori fundamental gerbe of essentially finite covers and Galois closure of towers of torsors 

      Antei, Marco; Biswas, Indranil; Emsalem, Michel; Tonini, Fabio; Zhang, Lei (2019)
      We prove the existence of a Galois closure for towers of torsors under finite group schemes over a proper, geometrically connected and geometrically reduced algebraic stack X over a field k. This is done by describing the ...
    • Notas de lógica EMALCA 2019 

      Zamora Calero, Rafael (2019)
      Estas notas fueron utilizadas en el curso Introducción a la Lógica durante la EMALCA organizada por el CIMPA en la sede del Atlántico en 2019. La lógica matemática es un área de matemática que estudia el lenguaje formal ...
    • 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 kinematics of the last Wigner particle 

      Gracia Bondía, José M.; Várilly Boyle, Joseph C. (2019)
      Wigner's particle classification provides for "continuous spin" representations of the Poincaré group, corresponding to a class of (as yet unobserved) massless particles. Rather than building their induced realizations by ...
    • 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 ...
    • On the Ramanujan–Lodge harmonic number expansion 

      Mortici, Cristinel; Villarino Bertram, Mark (2015-01-15)
      The aim of this paper is to extend and refine the Ramanujan–Lodge harmonic number expansion into negative powers of a triangular number. We construct a faster asymptotic series and some new sharp inequalities for the ...
    • 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 ...