Browsing by Title Facultad de Ciencias Físicas y Matemáticas
Now showing items 9272-9291 of 20720
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(Universidad de Chile, 2014)Se entenderá por calidad de servicio el conjunto de propiedades y estándares normales que, conforme la Ley y el Reglamento Eléctrico son inherentes a la actividad de distribución concesionada, y constituyen las condiciones ...
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(SIAM Publications, 2015)Variational problems under uniform quasi-convex constraints on the gradient are studied. Our technique consists in approximating the original problem by a one-parameter family of smooth unconstrained optimization problems. ...
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(AMER MATHEMATICAL SOC, 2005)We prove global existence of nonnegative solutions to the singular parabolic equation ut - Deltau+chi ({u> 0})(- u(-beta) +lambdaf(u)) = 0 in a smooth bounded domain Omega subset of R-N with zero Dirichlet boundary condition ...
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Existence and asymptotic behavior of solutions to semilinear elliptic problems via reduction methods (Universidad de Chile, 2012)Este trabajo se concentra principalmente en estudiar el método de reducción de Lyapunov-Schmidt y sus aplicaciones al estudio de existencia de soluciones a problemas semilineales elípticos. En particular, utilizamos ...
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Existence and multiplicity results for degenerate elliptic equations with dependence on the gradient (2007)We study the existence of positive solutions for a class of degenerate nonlinear elliptic equations with gradient dependence. For this purpose, we combine a blowup argument, the strong maximum principle, and Liouville-type ...
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Existence and nonexistence of positive solutions to some fully nonlinear equation in one dimension (Academic Press Inc., 2018)In this paper, we consider the existence (and nonexistence) of solutions to −Mλ,Λ ±(u″)+V(x)u=f(u)inR where Mλ,Λ + and Mλ,Λ − denote the Pucci operators with 0<λ≤Λ<∞ V(x) is a bounded function, f(s) is a continuous ...
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(Texas State Univ, 2015)This work concerns the existence of almost periodic solutions for certain di erential equations with piecewise constant arguments. The coef- cients of these equations are almost periodic and the equation can be seen as ...
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(Universidad de Chile, 2022)We study a Newtonian model, that allows us to describe some phenomena in stellar dynamics. This model is described by a partial differential equation known as the Vlasov equation or the Liouville equation, whose solutions ...
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(2011-07)We study the existence of local and global mild solutions of the fractional-order differential equations in an arbitrary Banach space by using the semigroup theory and the Schauder fixed-point theorem. We also give some ...
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(Society for Industrial and Applied Mathematics, 2013)For a boundedly generated drop [a,E] (a property which holds, for instance, whenever E is bounded), where a belongs to a real Banach space X and E ⊂ X is a nonempty convex set, we show that for every lower semicontinuous ...
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(Elsevier, 2020)This paper proposes an omega-periodic version of the Ellermeyer model of delayed chemostat. We obtain a sufficient condition ensuring the existence of a positive omega-periodic solution. Our proof is based on the application ...
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(Taylor & Francis, 2020)A quasi-equilibrium problem is an equilibrium problem where the constraint set does depend on the reference point. It generalizes important problems such as quasi-variational inequalities and generalized Nash equilibrium ...
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2010-12-01)In this paper, we study the motion of rigid bodies in a perfect incompressible fluid. The rigid-fluid system fils a bounded domain in R3. Adapting the strategy from Bourguignon and Brezis [1], we use the stream lines of ...
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(Universidad de Chile, 2018)Los modelos de elección nacidos de la Teoría de la Utilidad Aleatoria se han vuelto de gran utilidad para el estudio de la demanda en disciplinas tales como el transporte, el marketing o la economía, pues permiten explicar ...
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(Universidad de ChilePrograma Cybertesis, 2007)
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2005-11-01)It is well-known that the existential theory of equations in free groups is decidable. This is a celebrated result of Makanin which was published 1982. Makanin did not discuss complexity issues, but later it was shown that ...
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(2016)An increasing number of observations have shown that gaseous debris discs are not an exception. However, until now, we only knew of cases around A stars. Here we present the first detection of (CO)-C-12 (2-1) disc emission ...
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(Universidad de Chile, 2023)Esta tesis se basa en cuatro artículos científicos de primer autor. Primero, describo el descubrimiento de un exoplaneta tipo Júpiter caliente con un período orbital ultra-corto alrededor de la estrella tipo K NGTS-6, ...
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(The American Astronomical Society, 2010-10)We present high angular and spectral resolution Hi 21 cm line observations toward the cometary-shaped compact Hii region G213.880−11.837 in the GGD 14 complex. The kinematics and morphology of the photodissociated region, ...
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Expanding Metabolic Capabilities Using Novel Pathway Designs: Computational Tools and Case Studies (Wiley-VCH Verlag, 2019)Design and selection of efficient metabolic pathways is critical for the success of metabolic engineering endeavors. Convenient pathways should not only produce the target metabolite in high yields but also are required ...