Notas de Matemática: Envíos recientes
Voici les éléments 41-60 de 553
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Fórmula de conteo para un dominó de tres caras
(2010-05-17)In this article we obtain a formula that calculates the number of points that is obtained when adding the points of all pieces from a domino game of any size, based on its greatest double piece. Also we found the number ... -
The Bishop darboux rotation axis of the spacelike curves with a spacelike principal normal in minkowski 3-space
(2010-05-17)The Bishop darboux rotation for Spacelike curves with a spacelike Principal Normal in Minkowski 3-space E3 1 is decomposed into two simultaneous rotations. The axes of these simultaneous rotations are joined by a simple ... -
Almost preenvelopes of commutative rings
(2010-05-16)We study almost F-preenvelopes in the category of rings, for a significative class F of commutative rings. We completely identify those rings which have an almost F-preenvelope when F is the class of fields, semisimple ... -
Teoremas del punto fijo para T−operadores de Banach
(2010-05-16)En este artículo estudiamos la existencia de puntos fijos para T−operadores de Banach -
Minimal R1, minimal regular and minimal presober topologies
(2010-03-18)By means of filters, minimal R1 and minimal regular topologies are characterized on suitable intervals consisting of non-trivial R0 topologies. -
Some results on T−zamfirescu operators
(2010-03-18)The purpose of this paper is to obtain sufficient conditions for the existence of unique fixed point of T−zamficescu operators in complete metric spaces. -
Interior controllability of a strongly damped wave equation
(2010-03-18) -
A lower bound for the spectral radius of a digraph
(2010-03-18) -
Envelopes of commutative rings
(2010-03-18)Given a significative class F of commutative rings, we study the precise conditions under which a commutative ring R has an F-envelope. A full answer is obtained when F is the class of fields, semisimple commutative rings ... -
On Hilbert extensions of Weierstrass’ theorem with weights
(2010-03-18) -
Projective envelopes of finitely generated modules
(2010-02-02)Un problema bien conocido en la teoría de envolturas es la caracterización de los anillos para los cuales los módulos (finitamente generados, finitamente presentados, simple) tienen una (pre)envoltura proyectiva. En estas ... -
On some extensions of sequential topologies
(2010-02-02) -
In search of traces of some holomorphic spaces on polyballs
(2010-02-02)Consideramos que una nueva traza problema para las funciones holomorfas en las pelotas de poli que completamente generalizar una conocido problema mapa diagonal para el disco poli y dar una descripción completa de las ... -
Introducción a la teoría espectral de los operadores no lineales
(2010-02-02)¿Cómo se podría introducir un espectro para operadores no lineales que pueda preservar las propiedades “agradables” del caso lineal, pero que admita aplicaciones interesantes a una variedad amplia de problemas no lineales? ... -
Cone metric spaces and fixed point theorems of T−contrative mappings
(2009-10-21)En este trabajo, se estudia la existencia de puntos fijos para las asignaciones definidas en total, (secuencialmente compacto) cono espacio métrico, (M, d) que satisface una desigualdad de contracción general de depender ...