Now showing items 3-8 of 8

    • Convergence in nonlinear systems with a forcing term 

      Nápoles, J. E.; Ruiz, A. I. (2009-02-18)
      The problem of convergence, as t ® +¥ , of solutions of the system (1) is considered. It is assumed that the functions a , f and g are of class C1 for all values of their arguments, furtermore g' (x) > 0 , f ' (x) ³ r > ...
    • Coproductos fibrados de morfismos K-finitos 

      Acuña Ortega, Osvaldo (2009-02-18)
      In this paper we study conditions under which the push-out of morphisms K-finite are K-finite, and some related problems.
    • Interpretación geométrica de algunas variedades de Schubert 

      Escamilla, Juan F.; Castillo Montes, Mayra; Duarte Beza, Saúl (2012-03-29)
      In this article we give some geometrical interpretations of the Schubert-varieties of the Grassmannians G(2,4),G(3,5) and G(2, 5), and some of their applications to enumerative geometry.
    • Partición óptima: el algoritmo de Fisher 

      Espinoza, José Luis (2012-03-29)
      El algoritmo de Fisher es un algoritmo que calcula exactamente una partición óptima en k clases de un conjunto W de n individuos a los que se les ha medido una variable real v. Tal clasificación que se obtiene, aunque no ...
    • Recursive formulas for partition functions 

      Boza Cordero, Juan (2012-03-29)
      A family of functions, which share many properties with the classical partition function p(n), is studied. It is explained why these functions may be called “partition functions” and, in particular, some recursive formulas ...
    • Triángulos casi congruentes 

      Piza Volio, Eduardo (2012-03-29)
      En este artículo se estudian los triángulos casi congruentes, que consisten en las parejas de triángulos que tienen exactamente 5 de sus 6 elementos congruentes. Se caracterizan todas las soluciones enteras a este problema. ...