Browsing by Title Facultad de Ciencias
Now showing items 755-774 of 8178
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(POLISH ACAD SCIENCES INST MATHEMATICS, 2015)
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(University Szeged, 2015)This article deals with the asymptotic behavior of nonoscillatory solutions of fourth order linear differential equation where the coefficients are perturbations of constants. We define a change of variable and deduce that ...
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(Academic Press Inc., 1996)We prove existence theorems and asymptotic formulas for the solutions of a class of delay-differential equations with time-state dependent lag. © 1996 Academic Press, Inc.
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Asymptotic properties of solutions to nonautonomous Volterra difference systems with infinite delay (2001)We show that under certain conditions there is a one-to-one correspondence between weighted bounded solutions of a linear nonautonomous Volterra difference system with infinite delay and its perturbed system. Under additional ...
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(1992)Using dichotomy conditions, we obtain asymptotic formulae for the solutions of perturbed linear second order difference equations. © 1992.
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(Elsevier Ltd, 1997)
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(World Scientific Publishing, 2020)We study the existence and the asymptotic behavior of the solution of an abstract viscoelastic system submitted to non-local initial data. u(tt )+ Au - integral(t)(0) g(t - s)Bu(s)ds = 0 u(0) = xi(u) in V, u(t) (0) = eta(u) ...
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(WILEY-BLACKWELL, 2010-06-22)We study the effect of the non-linear process of ambipolar diffusion (joint transport of magnetic flux and charged particles relative to neutral particles) on the long-term behaviour of a non-uniform magnetic field in a ...
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(Universidad Catolica del Norte, 2007)In this work we present a way to find asymptotic formulas for some solutions of second order linear differential equations with a retarded functional perturbation.
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(2009)Using dichotomies and periodic conditions, we obtain asymptotic formulas for solutions of a difference system of Poincaré type with periodic coefficients. Some results about the theory of existence of periodic solutions ...
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(AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC, 2008-04-11)The Arabidopsis thaliana AtHMA1 protein is a member of the P-IB-ATPase family, which is implicated in heavy metal transport. However, sequence analysis reveals that AtHMA1 possesses a predicted stalk segment present in ...
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(2011)Glacial geologic studies in the Southern Hemisphere (SH) mid-latitudes (40-54°S) indicate renewed glacial activity in southern South America (Patagonia) and New Zealand's (NZ) South Island starting at ~7 kyr, the so-called ...
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(American Chemical Society, 2013)A system in a spatially degenerate ground state responds in a qualitatively different way to positive and negative point charges. This means that the molecular electrostatic potential is ill-defined for degenerate ...
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(1988)Correlation energy differences have been evaluated using an empirical polarization potential for the two-, three-, and four-electron atom series. In contrast to local-density approximations the Z dependency of the correlation ...
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(The Electrochemical Society, 2007-02-02)We report the detailed characterization of high quality vanadium oxide VOx nanotubes NTs and highlight the zipping of adjacent vanadate layers in such NTs formed on remarkable nanourchin structures. These nanostructures ...
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Atomic scale model and electronic structure of Cu2O/CH3NH3PbI3 interfaces in perovskite solar cells (American Chemical Society, 2020)Cuprous oxide has been conceived as a potential alternative to traditional organic hole-transport layers in hybrid halide perovskite-based solar cells. Device simulations predict record efficiencies using this semiconductor, ...
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(2002)It is shown that information theory concepts based on the Shanon entropy are useful to define indices yielding a quantitative measure of spin polarization. Numerical results for the ground state of all the atoms from He ...