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  • HOMOLOGICAL SYSTEMS IN MODULE CATEGORIES OVER PRE-ORDERED SETS
    Mendoza, O; Saenz, C; Xi, CC (2009)
    We introduce the so-called homological systems in a module category over a pre-ordered set, which generalize the notion of a stratifying system over a linearly ordered set, and study both the corresponding modules filtrated ...
  • The hyperspaces C(p,X) for atriodic continua
    Pellicer-Covarrubias, P (2005)
    Let C(X) denote the hyperspace of subcontinua of a continuum X. For A is an element of C(X), define the hyperspace C(A, X) = {B is an element of C(X) : A subset of B}. We prove that nondegenerate Whitney levels of C(p, X) ...
  • II INTERNATIONAL-COLLOQUIUM ON THE HISTORY AND PHILOSOPHY OF MATHEMATICS - DECEMBER 10-13, 1990
    GarcíaDIEGO, AR (1992)
  • Independent sets which meet all longest paths
    RinconMejia, HA; GaleanaSánchez, H (1996)
    We prove some sufficient conditions for a directed graph to have the property of a conjecture of J.M. Laborde, Ch. Payan and N.H. Huang (1982): ''Every directed graph contains an independent set which meets every longest ...
  • Infinity manifolds of cubic polynomial Hamiltonian vector fields with 2 degrees of freedom
    Falconi, M; Lacomba, EA; Llibre, J (2000)
    Let X be the Hamiltonian vector field with two degrees of freedom associated to the cubic polynomial Hamiltonian H(x,y,z,w). Using the Poincare compactification we show that all the energy levels of X in R-4 reach the ...
  • Influence of vertical and mechanical transmission on the dynamics of dengue disease
    Esteva, L; Vargas, C (2000)
    We formulate a non-linear system of differential equations that models the dynamics of transmission of dengue fever. We consider vertical and mechanical transmission in the vector population, and study the effects that ...
  • Instrumentos y matemáticas
    Falconi-Magaña, M (Las Prensas de Ciencias, 2005)
    La utilización de máquinas y juegos matemáticos como alternativa para mejorar la enseñanza de las matemáticas es la propuesta de este texto.
  • Introducción a la geometría avanzada
    Ramírez-Galarza, A I; Seade-Kuri, J (Las Prensas de Ciencias, 2002)
    Este libro presenta las ideas fundamentales de las diversas áreas que se abren ante quien ha concluido los dos primeros semestres de geometría analítica ya que abarca: geometría no euclidiana, geometría afín, geometría ...
  • Introducción a la programación lineal
    Hernández-Ayuso, M C (Las Prensas de Ciencias, 2007)
    En este libro el estudiante encontrará un apoyo invaluable para cursos introductorios de investigación de operaciones o programación lineal de las carreras de actuaría, matemáticas, ingenierías y administración. Tiene ...
  • Introducción a la teoría intuitiva de conjuntos
    Gómez-Laveaga, C (Las Prensas de Ciencias, 2007)
    El libro consta de cuatro capítulos. El primero es una introducción rápida a la teoría de conjuntos. El capítulo 2 presenta el Axioma de Elección y algunas de sus equivalencias. El capítulo 3 está dedicado a los números ...
  • INTRODUCTION TO ALGEBRAIC K-THEORY
    LLUISPUEBLA, E (1992)
    These notes contain a series of ten lectures delivered at the ''Universidad Nacional Autonoma de Mexico'' on its ''Primer Seminario de K-Teoria Algebraica''. They provide an introduction to the subject as well as to the ...
  • Invariant pseudometrics on Palais proper G-spaces
    de Neymet, S; Antonyan, SA (2003)
    Let G be a locally compact Hausdorff group. It is proved that: (1) on each Palais proper G-space X there exists a compatible family of Ginvariant pseudometrics
  • Invitación a las geometrías no euclidianas
    Ramírez, A I; Sien, G (Las Prensas de Ciencias, 2003)
    Las geometrías no euclidianas involucran disciplinas aparentemente tan disímbolas como son la geometría, las artes y la lógica. Este libro pone al alcance del neófito esta apasionante disciplina.
  • ITERATED COIL ENLARGEMENTS OF ALGEBRAS
    Tomé Arreola, Bertha Maria (1995)
    Let Lambda be a finite-dimensional, basic and connected algebra over an algebraically closed field, and mod Lambda be the category of finitely generated right Lambda-modules. We say that Lambda has acceptable projectives ...
  • ITERATED TUBULAR ALGEBRAS
    DELAPENA, JA; Tomé, BM (1990)
  • Key dynamics from a simple model of HIV infection
    Garduno, FS; Kirschner, D; Reynolds, J (1998)
    There have been many models to date describing the interaction of the immune system with HIV. Each presents some aspect or aspects of the immune system believed to play a key role in the disease dynamics. In this study, ...
  • L-P-continuity of conditional expectations
    Alonso, A; Brambila-Paz, F (1998)
    A necessary and sufficient condition on a sequence {A(n)}(n is an element of N) of sigma-subalgebras that assures L-p-convergence of the conditional expectations is given. This result generalizes the L-p-martingales, the ...
  • Large-scale oscillation of structure-related DNA sequence features in human chromosome 21
    Li, WT; Miramontes, P (2006)
    Human chromosome 21 is the only chromosome in the human genome that exhibits oscillation of the (G+C) content of a cycle length of hundreds kilobases (kb) (500 kb near the right telomere). We aim at establishing the existence ...
  • The lattice structure of preradicals
    Raggi, F; Montes, JR; Rincon, H; Fernandez-Alonso, R; Signoret, C (2002)
    In this paper we study the lattice of all preradicals on a ring R. We describe this lattice, we prove that it is an atomic and coatomic lattice and we describe the atoms and coatoms. We also give characterizations of simple ...
  • LINES OF CURVATURE NEAR UMBILICAL POINTS ON SURFACES IMMERSED IN R(4)
    SánchezBRINGAS, F; RamirezGALARZA, AI (1995)
    Let M be a compact orientable surface, I : M --> R(4) an immersion of class C-r and nu a normal unitary smooth vector field. We prove that in the space of pairs (I, nu) the family of pairs all whose umbilical points are ...

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