Envíos recientes

  • Niveles de radioactividad en tres regiones de Costa Rica 

    Mora Rodríguez, Patricia (2011-02-15)
    The establishment of the first radioactivity levels of natural radiation was carried out during the period 1991 to 1994 in three different regions of Costa Rica. The radionuclides studied belong to different soil types ...
  • Historia del campo geomagnético de Costa Rica 

    Páez, Jorge E.; Jiménez, M.; Leandro, German (2011-02-15)
    The study of the geomagnetic field began with the publication of the book De Magnete (1600) of Sir William Gilbert (1504-1603). By influence of Sir Edmund Halley the British Marine is obligated to make measurements of the ...
  • Acerca de si pudo o no ser el universo anisotrótipico 

    Alvarado, Rodrigo (2011-02-15)
    The theoretical and experimetnal problem concerning the origin and formations of the universe is establish in this paper, specially by developing some theories that try to explain this phenomena, and also to settle the ...
  • Álgebras-MV artinianas y noetherianas 

    Belluce, L. P. (2011-02-14)
    Estudiamos álgebras-MV que satisfacen las condiciones de cadena ascendente o de cadena descendente por ideales. Por ejemplo, si un álgebra es artiana, entonces tiene un número finito de ideales primos y minimales. También ...
  • Aplicación de las técnicas de punto fijo 

    Azofeifa Z., Carlos E. (2011-02-15)
    This article will develop a computacional procedure for approximating a fixed point of continuos functions of the simplex into itself using the Brouwer`theorem. We also shows the different applications of the theory of ...
  • Punto fijo una teoría interdisciplinaria 

    Azofeifa Z., Carlos E. (2011-02-15)
    We show a survey of the theory of the fixed point by commenting the most important theorems and their applications in the mathematical fields as well as in other disciplines: economy, theory of games and optimization. We ...