[EN] In this work we study through differential equations systems several models of natural behaviour between animals into a comun ecosystem. Finally, we show a wide collection of examples in order to point out the biological ...

[EN] In this article we provide a method in order to generate some numeric inequalities from a special sort of functions f which satisfy identities containing the terms f(x-y), f(x) and f(y), like exponential and trigonometric ...

[ES] El trabajo que hemos desarrollado en este artículo es un estudio de un método histórico desarrollado por Descartes para calcular la recta normal a una curva, y que puede ser aprovechado para calcular derivadas puntuales ...

[ES] En este trabajo proponemos un método distinto al usual para deducir dos de los principales infinitésimos equivalentes. La riqueza del método estriba en que obtenemos los mencionados resultados analíticos a partir de ...

[EN] In this article we give a new formulation and proof of the well-known integral criterion to study the carácter of a numerical series which terms are positives. This new approach is more intuitive because it allows to ...

[EN] We propose a different approach to standard way in order to study several selected aspects of metric geometry in three dimensions, which are developed in the course 2º B.C.N. We think that the study we propose is ...

[EN] In this article we study a method that belongs to Monte-Carlo procedures in order to evaluate definide integrals. In particular, we point out through several examples, some computational drawbacks that can appear in ...

[EN] In this article we show a statistics method in order to evaluate definide in-tegrals. This method is called Monte-Carlo procedure. It is based upon geometrical interpretation of probability and it provides ...

In this paper we construct, by means of random power series, the solution of second order linear differential equations of Legendre-type containing uncertainty through its coefficients and initial conditions. By assuming ...

[ES] En este trabajo se estudia una modificación del método de mínimos cuadrados ordinarios lineal, basada en la medición de las desviaciones en el mismo sentido que en geometría analítica plana se mide la distancia de un ...