Buscar
Mostrando ítems 31-40 de 843
Sound waves and solitons in hot and dense nuclear matter
(ELSEVIER SCIENCE BV, 2009)
Assuming that nuclear matter can be treated as a perfect fluid, we study the propagation of perturbations in the baryon density. The equation of state is derived from a relativistic mean field model, which is a variant of ...
Sistemas de equações diferenciais ordinárias de primeira ordem
(Universidade Tecnológica Federal do ParanáCornelio ProcopioBrasilLicenciatura em MatemáticaUTFPR, 2015)
In this course conclusion work we study concepts of first order linear ordinary differencial equa-tions systems and from the understanding of these concepts, we approach the stability of thesesystems. We present theorems ...
A spectral dichotomy version of the nonautonomous Markus-Yamabe conjecture
(Elsevier, 2020)
In this article we introduce a nonautonomous version of the Markus-Yamabe conjecture from an exponential dichotomy spectrum point of view. We prove the validity of this conjecture for the scalar and triangular case. ...
Periodic solutions of an abstract third-order differential equation
(2013)
Using operator valued Fourier multipliers, we characterize maximal regularity for the abstract third-order differential equation αu′″ (t)+u″ (t) = βAu(t)+γBu′(t) + f(t) with boundary conditions u(0) = u(2π), u′(0) = u′(2π) ...
Mild solutions of non-autonomous second order problems with nonlocal initial conditions
(Elsevier, 2014)
In this paper we establish the existence of mild solutions for a non-autonomous abstract semi-linear second order differential equation submitted to nonlocal initial conditions. Our approach relies on the existence of an ...
Estimación en parámetros en problemas inversos
(2014-05)
En esta tesis se estudian problemas de optimización cuyas restricciones son ecuaciones en derivadas parciales parabólicas. En el primer caso se estima el coeficiente de difusión, correspondiente a un problema de difusión ...
Monotone waves for non-monotone and non-local monostable reaction–diffusion equations
(Elsevier, 2016)
We propose a new approach for proving existence of monotone wavefronts in non-monotone and non local monostable diffusive equations. This allows to extend recent results established for the particular case of equations ...
Ecuación diferencial mediante funciones del sistema fundamental de soluciones
(2018-11-01)
Comprende la explicación de un ejercicio en el cual se muestra como obtener una ecuación diferencial de tal forma que ciertas funciones dadas constituyan soluciones del sistema fundamental de soluciones . Para ello se ...