ListarNotas de Matemática por tema "Matemáticas"
Mostrando ítems 1-20 de 300
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A Generalization of Modular Sequence Spaces by Cesàro Mean of Order One
(SABER-ULA, Venezuela, 2011-06-30)In this paper, we introduce the modular sequence spaces generated by Cesµaro mean of order one and give several properties relevant to algebraic and topological structures of these spaces. -
A lower bound for the spectral radius of a digraph
(2010-03-18) -
A new proof for the Euler theorem in the complex numbers theory
(2010-05-17)In the paper, a new proof for the Euler equation (exp(ix) = cos x + i sin x) has been presented. At first, a new and general formula has been proved from which the Euler equation has been derived. -
A note on Lanczos generalized derivative
(Venezuela, 2010-11-02)Lanczos introduced an integral expression for calculating the derivative of a function, if this is continuous in the point x under analysis. Here we extend this expression to the case of a finite discontinuity at x. -
A study of a new subclass of multivalent analytic functions
(SABER-ULA, Venezuela, 2011-06-30)After introducing a new linear differential operator, we introduce and study certain new subclasses of analytic and multivalent functions in the open unit disk. Some inclusion relationships also discussed in particular ... -
A study of certain new subclasses defined in the space of analytic functions
(2011-10-17)An attempt has been made to introduce certain new subclasses of analytic function bounds by some differential operator also define in the space of analytic functions. We study and investigate various inclusion properties ... -
A study of meromorphically starlike and convex functions
(SABER-ULA, Venezuela, 2011-07)In the present paper we introduce and study certain new subclasses of starlike and convex functions in the domain of meromorphic functions. Moreover we discuss coefficient inequalities, growth and distortion theorems, radii ... -
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 ... -
Application of a new family of functions on the space of analytic functions
(2011-10-17)In this paper we investigate a family of integral operators defined on the space of analytic functions. By making use of these novel integral operators we give some applications of the new families of analytic functions ... -
Bertrand mate of null biharmonic curves in the Lorentzian Heisenberg group Heis.
(Venezuela, 2010-11-30)In this paper, we study null biharmonic curves and we characterize null biharmonic curves in terms of their curvature and torsion in the Lorentzian Heisenberg group Heis3. Moreover, we construct parametric equations of ... -
Biharmonic curves in the special three-dimensional Kentmotsu manifold K with η-parallel Ricci tenso.
(SABER-ULA, Venezuela, 2011-06-30)In this paper, we study biharmonic curves in the special three-dimensional Kenmotsu manifold K with ´-parallel Ricci tensor. We characterize the biharmonic curves in terms of their curvature and torsion. -
Characterization inextensible flows of developable surfaces associated focal curve of spacelike curve with timelike binormal in E31
(SABER-ULA, Venezuela, 2011-06-30)In this paper, we study inextensible flows of developable surfaces associated with focal curves of spacelike curves with timelike binormal in Minkowski 3-space E3 1 . We show that if flow of this developable surface is ... -
Comments on differentiable over function of split quaternions
(2011-10-17)The theory of mathematical analysis over split quaternions is formulated in a closest possible analogy to the usual theory of analytic functions of a complex variable. After reviewing split quaternion algebra via an ... -
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 ... -
Distances, structured profiles and arrow’s theorem
(2009-10-21)Estudiamos espacios de alternativas estructurados por una distancia d. Con ayuda de d podemos construir funciones con dominio el producto cartesiano de las alternativas por los subconjuntos no vacíos de alternativas. ... -
Dual spacelike elastic biharmonic curves with spacelike principal normal according to dual Bishop frames D3 1
(2011-10-17)In this paper, we study dual spacelike elastic biharmonic curves with spacelike principal normal in dual Lorentzian space D3 1. -
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 ... -
Evolute curves of biharmonic curves in the special three-dimensional Ø-Ricci symmetric Para-Sasakiam manifold P.
(SABER-ULA, Venezuela, 2011-06-30)In this paper, we study evolute curve of biharmonic curve in the special three-dimensional Á¡Ricci symmetric para-Sasakian manifold P. We characterize evolute curve of biharmonic curve in terms of curvature and torsion of ... -
Expansión de las soluciones para ecuaciones integrales cuadráticas
(Venezuela, 2010-11-02)