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Information security has been one of the most sensible issues when designing communications systems; especially when this information is cataloged as confidential. This paper deals with a secure system that let you get access to privileged data, when the medium access is a wireless network based on IEEE 802.11 standard. The system designed is conformed by… (More)
We show that the Gregory-Newton infinite expansion for equidistant interpolation gives a simple approach to Laplace transform of Laguerre polynomials, which has an immediate usefulness to determine radial matrix elements for hydrogen-like atoms.
We show that well known properties of Laguerre polynomials permit to motivate the definition of Riemann-Liouville for the fractional derivative.
In this paper it is shown a circuit-theory approach for the integral equation for thin wire antennas, from which Pocklington's equation can be deduced as a special case. In this way, when solving it via method of moments, impedance, current and voltage matrix acquire meaning . It is shown that a thin wire can be considered as an infinite-port electric… (More)
We show the importance that the Lanczos invariant has in the study of 4 R embedded into 5 E , in the analysis of non-null constant vectors, and in the existence of the Lanczos potential for the Weyl tensor.
We give an elementary exposition of the Lanczos technique to solve the matrix eigenvalue problem. This Lanczos procedure is one of the most frequently used numerical methods in matrix computations, and it is one of the 10 algorithms that exerted the greatest influence in the development and practice of science and engineering in the 20th century. Resumen… (More)
A necessary algebraic condition is obtained for the intrinsic geometry of any spacetime locally and isometrically embedded into a pseudo-Euclidean 5-space.
We show the usefulness of the hypervirial theorem to obtain the matrix elements au m e n γ − for the Morse potential. Besides, it is known that the hydrogenlike atom can be studied as a Morse oscillator, then here we prove that these fact leads to an interesting method to calculate 2 1 k nl r nl % for the Coulomb interaction. 1. Introducción In  it was… (More)
It is known that the hydrogenlike atom can be studied as a Morse oscillator, then here we show that these fact leads to an interesting method to obtain the matrix elements for the Coulomb potential.