Notas de Matemática: Envíos recientes
Itens para a visualização no momento 21-40 of 553
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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. -
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. -
On characterization dual spacelike biharmonic curves with spacelike principal normal according to dual Bishop frames in the dual Lorentzian space D3 1
(2011-01-11)In this paper, we study dual spacelike biharmonic curves with spacelike principal normal in dual Lorentzian space D3 1: We characterize curvature and torsion of dual spacelike biharmonic curves with spacelike principal ... -
On some series of functions
(2011-01-11)The study of the Fourier series convergence is a frequent subject in the speciality literature (see [3], [4]). It is known that the Fourier series convergence is very useful in the technical problems: the electromagnetic ... -
Geometrical inequalities unconventional demonstrated
(2011-01-11)In this paper we have synthetized more geometric inequalities at which we can give unconventional solutions. The applications and some solutions are selected from the bibliography attached to this paper. We consider that ... -
Null biharmonic curves in the Lorentzian Heinsenberg group Heis3
(Venezuela, 2010-11-30)In this paper, we study biharmonic curves and we characterize null biharmonic curves in terms of their curvature and torsion in the Lorentzian Heisenberg group Heis3. We give necessary and sufficient conditions for null ... -
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 ... -
Mannheim curves in terms of its timelike biharmonic partner curves in the Lorentzian Heisenberg Group Heis3
(Venezuela, 2010-11-30)In this paper, we study Mannheim curves in the Lorentzian Heisenberg group Heis3. We characterize Mannheim curves in terms of its horizontal biharmonic partner curves in the Lorentzian Heisenberg group Heis3 -
On some parametric representations of certain analytic and meromorphic classes on the complex plane
(Venezuela, 2010-11-30)We introduce and study certain new scales of analytic and meromorphic functions in the unit disc and solve some problems in these scales. We provide complete descriptions of zero sets, then we present some new parametric ... -
Separation axioms and the prime spectrum of commutative semirings
(Venezuela, 2010-11-29) -
Método de homogeneización asociado a un problema elíptico de segundo orden con valores en la frontera
(Venezuela, 2010-11-02) -
Expansión de las soluciones para ecuaciones integrales cuadráticas
(Venezuela, 2010-11-02) -
On acceleration pole points in special Frenet and Bishop motions
(Venezuela, 2010-11-02) -
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. -
Power expansions in terms of shifted Chebyshev-Lanczos polynomials
(Venezuela, 2010-11-02)We exhibit two procedures to express xn in terms of the shifted Chebyshev polynomials, which is useful to reduce the degree of a polynomial in the interval [ 0, 1 ]. -
Weierstrass representation formula in the group of rigid motions E(2)
(Venezuela, 2010-11-02)In this paper, we prove a Weierstrass representation formula for simply connected immersed maximal surfaces in E(2). Using the Weierstrass representation we also give a simple proof of the fact that maximal immersions is ... -
Precubiertas de anillos
(Venezuela, 2010-11-01)En este trabajo se introduce el concepto de precubiertas sobre la clase de los anillos asociativos con unidad. Se estudia en particular el caso de los cuerpos, como clase importante desde el punto de vista álgebra - geométrico. -
On the complexity of the family of compact subsets of Q
(2010-05-17) -
Taxonomy of improvement operators and the problem of minimal change
(2010-05-17)Improvement operators is a family of belief change operators that is a generalization of usual iterated belief revision operators. The idea is to relax the success property, so the new information is not necessarily believed ... -
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.