Revistas académicas de la Universidad Católica del Norte
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On the hyperbolic dirichlet to neumann functional in Hn and Sn
No full textWe prove the injectivity of the linearizatíon of the hyperbolíc Dirichlet to Neumann functional in a "small" bounded domain of the hyperbolic space Hn (resp., the sphere Sn) under some suitable transversality condition
Dihedral groups are of schottky type
No full textWe show that a dihedral group H of conforma! automorphisms of a closed Riemann surface S can be lifted for a suitable Schottky uniformization of S. In particular, this implies the existence of a suitable symplectic homology basis of S for which the symplectic representation of H has a simple form
Intuitionistic fuzzy n-normed algebra and continuous product
No full textIn this paper we extend the notion of intuitionistic fuzzy n-normed linear space (IFnNLS) to define an intuitionistic fuzzy n-normed algebra (IFnNA). We give a necessary and sufficient condition for an IFnNA to be with continuous product. Further, the concept of multiplicatively continuous product has been introduced and related results have been established. Illustrative examples have been provided in support of our results
Cosine families of operators in a class of Fréchet spaces
No full textM. sova [10] proved that the infinitesimal generator of all uniformly continuous cosine family, of operators in Banach space, is a bounded operator. We show by counter-example that the result mentioned above is not true in general on Fréchet spaces, and we prove that the infinitesimal generator of an uniformly continuous cosine family of operators in a class of Fréchet spaces (quojection) is necessarily continuous
Errores de redondeo en un computador
No full textA. Números de un computador.Cada computador puede representar sólo números con una mantisa de k cifras, (k depende del modelo). Por esos los números de la máquina tienen la forma: z = + . d1 d2 ... dk . 10
On estimates for the generalized Fourier-Bessel transform
No full textTwo estimates useful in applications are proved for the generalized Fourier-Bessel transform in the space L2a,n as applied to some classes of functions characterized by a generalized modulus of continuity
 
Multiple solutions of stationary Boltzmann equation
No full textWe find two fixed points differents of cero of the operator in an Sobolev Spaces in L¹ (Ω) with Ω ⊆ Rn and they are solutions of Boltzmann equation
An integral functional equation on groups under two measures
No full textLet G be a locally compact Hausdorff group, let σ be a continuous involutive automorphism on G, and let µ, ν be regular, compactly supported, complex-valued Borel measures on G. We find the continuous solutions f : G → C of the functional equation
in terms of continuous characters of G. This equation provides a common generalization of many functional equations (d’Alembert’s, Cauchy’s, Gajda’s, Kannappan’s, Stetkær’s, Van Vleck’s equations...). So, a large class of functional equations will be solved.
 
New interpretation of elliptic Boundary value problems via invariant embedding approach and Yosida regularization
No full textThe method of invariant embedding for the solutions of boundary value problems yields an equivalent formulation to the initial boundary value problems by a system of Riccati operator differential equations. A combined technique based on invariant embedding approach and Yosida regularization is proposed in this paper for solving abstract Riccati problems and Dirichlet problems for the Poisson equation over a circular domain. We exhibit, in polar coordinates, the associated Neumann to Dirichlet operator, somme concrete properties of this operator are given. It also comes that from the existence of a solution for the corresponding Riccati equation, the problem can be solved in appropriate Sobolev spaces
Remodelación y recuperación urbana area Puerto Norte de Rosario, Argentina
No full textEl objetivo general de este Seminario y Proyecto fue explorar las posibilidades de renovación de las áreas de obsolescencia en torno a los centros de la ciudad, producidos por cambios de destino y uso de estos lugares, a rapiz de la dínamica de crecimiento de la ciudad