Revistas académicas de la Universidad Católica del Norte
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1687 research outputs found
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Une application du calcul "umbral" non classique en topologie algebrique
No full textEn utilisant les techniques du calcul "umbral" non classiques défini par le bigroupe formel élémentaire du 1er type (b.f. e. 1) sur E*(pt)?Q, on calcule l'image de E*(HP? ) par l'homomorphisme d 'Hurewicz E ? E ? HQ, o E est un spectre-anneau dfinissant une thorif cohomologique C-orientée spéciale
Train polinomios
No full textLos train polinomios son usados para estudiar la clase de los E –ideales de una álgebra bárica (A,?) [1], [2], [3]. En este trabajo hacemos una construcción de los train polinomios que justifica su tratamiento como estructuras ligadas a un cierto tipo de aritmética
Métriques de lorentz zoll sur la surface de de sitter
No full textIn this paper, we will built a Lorentzian sur faces (S, g) homeomorphe but not isometric to de Sitter surface and whose all geodesics of space type are periodic with the same lenght 2?. This gives lorentzian analogue to Zoll surfaces
A new convergence theorem for the method of tangent hyperbolas in banach space
No full textIn this study we appmximate a locally unique solution of a non-linear operator equtation in Banach space using the method of tangent hyperbolas. A new semilocal convergence theorem is provided using Lipschitz conditions on the second Fréchet-derivative. Our conditions are different than earlier ones. Hence, they have theorctical and practical value. Numerical examples are also provoded
Sur l'homologie des déformations de modules différentiels
No full textCe travail est consacré à la démonstration de deux résultats concernant l 'homologie des déformations de modules différentiels, et reliant respectivement l 'homologie d 'une déformation formelle à celle d 'une déformation "à paramètre fixé" et à celle de la déformation triviale.This work is devoted to the proof of two results concerning the homology of deformations of differential modules, and relating respectively the homology of a formal deformation to the homology of a deformation "with fixed parameter" and of the trivial deformation
Fine spectrum of the upper triangular matrix U(r, 0, 0, s) over the sequence spaces c₀ and c
No full textFine spectra of various matrices have been examined by several authors. In this article we have determined the fine spectrum of the upper triangular matrix U(r, 0, 0, s) on the sequence spaces c₀ and c
Quantum Markov semigroups
No full textSemigroups of completely positive operators are a fundamental tool in the theory of quantum Markov processes. Several results on this class of semigroups-mostly in the uniformly continuous case-are scattered in the literature. In this chapter we give a self-contained exposition of the basic results on uniformly continuous completely positive semigroups
On the graded classical prime spectrum of a graded module
No full textLet G be a group with identity e. Let R be a G-graded commutative ring and M a graded R-module. In this paper, we introduce and study a new topology on Cl.Specg(M), the collection of all graded classical prime submodules of M, called the Zariski-like topology. Then we investigate the relationship between algebraic properties of M and topological properties of Cl.Specg(M). Moreover, we study Cl.Specg(M) from point of view of spectral space
Fekete-Szego problem for certain analytic functions defined by q−derivative operator with respect to symmetric and conjugate points
No full textRecently, the q−derivative operator has been used to investigate several subclasses of analytic functions in different ways with different perspectives by many researchers and their interesting results are too voluminous to discuss. For example, the extension of the theory of univalent functions can be used to describe the theory of q−calculus, q−calculus operator are also used to construct several subclasses of analytic functions and so on. In this work, we considered the FeketeSzego problem for certain analytic functions defined by q−derivative operator with respect to symmetric and conjugate points. The early few coefficient bounds were obtained to derive our results