Now showing items 1-20 of 452

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      Álgebras de Abel  [Article]

      Arias de Reyna Martínez, Juan (Real Academia de Ciencias Exactas, Físicas y Naturales, 1974)
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      Integración en álgebras de Abel  [Article]

      Arias de Reyna Martínez, Juan (Real Academia de Ciencias Exactas, Físicas y Naturales, 1974)
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      Funciones derivables en cuaterniones  [Article]

      Arias de Reyna Martínez, Juan (Real Sociedad Matemática Española, 1975)
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      Álgebras de Abel cerradas  [Article]

      Arias de Reyna Martínez, Juan (Real Academia de Ciencias Exactas, Físicas y Naturales, 1975)
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      Continuous dependence for implicit differential equations in Banach spaces  [Article]

      Domínguez Benavides, Tomás (Universitat de Barcelona, 1980)
      In this paper we derive an existence theorem for the implicit defferential equation F(t, x,x') = 0 ; x(to) = are where F is a β-Lipschitz or α-Lipschitz operator in the second variable. The existence of maximal and unlimited ...
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      Aplicaciones de las categorías de Baire a la existencia de solución de una ecuación diferencial en un espacio de Banach  [Article]

      Domínguez Benavides, Tomás (Real Academia de Ciencias Exactas, Físicas y Naturales, 1981)
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      Definición y estudio de una función indefinidamente diferenciable de soporte compacto  [Article]

      Arias de Reyna Martínez, Juan (Real Academia de Ciencias Exactas, Físicas y Naturales, 1982)
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      Non Baire measure spaces  [Article]

      Arias de Reyna Martínez, Juan (Institut de Matemàtica, Universitat de Barcelona, 1983)
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      Algunos espacios topológicos que admiten una medida-categoría  [Article]

      Ayerbe Toledano, José María (Universitat de Barcelona, 1984)
      Let X be a topological space. A category measure m on X is a countably aditive finite measure defined on the σ-algebra formed by all sets with the Baire property, such that m(E)=0 iff E is of Baire first category. It is ...
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      El problema onomástico para los ordinales numerables  [Article]

      Arias de Reyna Martínez, Juan (Real Academia de Ciencias Exactas, Físicas y Naturales, 1984)
      Assuming the existence of inaccesible cardinal numbers it is proved that there is not a notation, for each numerable ordinal number, satisfying the conditions imposed by N. Cuesta Dutari in his book La matemática del orden (1959).
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      I ∞ 0 (∑) no es totalmente tonelado  [Article]

      Arias de Reyna Martínez, Juan (Real Academia de Ciencias Exactas, Físicas y Naturales, 1985)
      Let ∑ be an infinite σ-field and denote by I ∞ 0 (∑) the space spanned by the characteristic functions of elements of ∑, endowed with the supremum norm. We prove that I ∞ 0 (∑) is not totally barrelled.
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      Grothendieck locally convex spaces of continuous vector valued functions  [Article]

      Freniche Ibáñez, Francisco José (Mathematical Sciences Publishers, 1985-12-01)
      Let ^{X, E) be the space of continuous functions from the completely regular Hausdorff space X into the Hausdorff locally convex space E, endowed with the compact-open topology. Our aim is to characterize the ^(X, E) spaces ...
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      La categoría-base de los abiertos regulares de un espacio topológico  [Article]

      Ayerbe Toledano, José María (Universitat de Barcelona, 1986)
      In this paper we study, for a given topological space the category base of the regular open sets. We apply the results to the study the Lebesgue's density topology in R.
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      Estabilidad de espacios localmente convexos por ultraproductos  [Article]

      Facenda Aguirre, José Antonio (Real Academia de Ciencias Exactas, Físicas y Naturales, 1986)
      Estudiamos en este artículo la estabilidad de algunas clases de espacios localmente convexos bajo la formación de ultraproductos. Se demuestra que los espacios bornologicos y ultrabornológicos son estables (teorema 2) pero ...
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      Exponente de convergencia generalizado de una sucesión compleja  [Article]

      Bernal González, Luis (Universitat de Barcelona, 1987)
      Our aim in this paper is to give several new expressions for the kth-convergence exponent of a complex sequence, and an extension of this concept to a certain class of real functions.
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      Funciones con derivadas sucesivas grandes y pequeñas por doquier  [Article]

      Bernal González, Luis (Universitat de Barcelona, 1987)
      In this paper we show that, given two double sequences of positive real numbers, α and β, the subset of all functions defined on an open real set which have big derivatives and small ones with respect to α and β, at every ...
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      Sobre la existencia y el cálculo de ceros de funciones regulares  [Article]

      Soriano Arbizu, José María (Real Academia de Ciencias Exactas, Físicas y Naturales, 1988)
      For a map / of class two a sufficient condition is obtained to secure the existence of a zero of f in the simplex 5 if a piecewise Hnear aproximation 9 of f has a cero in s. Application: for a smooth map F: D ⊆ Cn → Cn a ...
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      Axiomática para el grado muitivaluado  [Article]

      López Acedo, Genaro (Real Academia de Ciencias Exactas, Físicas y Naturales, 1988)
      In this paper we develop an axiomatic theory for the multivalued degree that preserves the basic properties of the classical degree. We apply it to obtain fixed point theroems and existence of solution fix) = p. We give a ...
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      Orden relativo de crecimiento de funciones enteras  [Article]

      Bernal González, Luis (Universitat de Barcelona, 1988)
      In this paper, we essay a generalization of the classical concept of growth order of an entire function. We define the new parameter ρg(f), the relative growth order of f(z) with respect to g(z), which establishes a direct ...
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      A special type of triangulations in numerical nonlinear analysis  [Article]

      Soriano Arbizu, José María (Universitat de Barcelona, 1990)
      To calculate the zeros of a map f : D ⊆ Rn → Rn we consider the class of triangulations of Rn so that a certain point belongs to a simplex of fixed diameter and dimension. In this paper two types of this new class of ...