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The classical partition function for a system in thermodynamical equilibrium formed by N identical non-relativistic particles interacting through Coulomb potentials and with the dynamical dectromagnetic field is studied. It is proved that the dy[...]texto impreso
Díaz-Guerra Viejo, Carlos ; Piqueras de Noriega, Javier ; Tomashpolsky, Y. Y. ; Sadovskaya, N. V. | Akademie Verlag GMBH | 1996-06-16Cathodoluminescence (CL) and secondary electron emission (SEE) in the scanning electron microscope have been used to study the effects of mechanical polishing and electron irradiation on YBa2Cu3O7-x ceramics. CL spectra from the mechanically pol[...]texto impreso
In this work, we show that the fundamental structure of the electronic energy spectrum of binary Fibonacci quasicrystals can be decomposed in terms of two main contributions, stemming from two related characteristic symmetries. The algebraic app[...]texto impreso
Díaz-Guerra Viejo, Carlos ; Pal, U. ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | Akademie Verlag GMBH | 1995-01-16The effect of indentation on the cathodoluminescence (CL) of CdTe in the scanning electron microscope is investigated. Deformation produces deep level emission changes, in particular, a relative intensity increase of the 1.4 and 1.1 eV bands, ex[...]texto impreso
We have theoretically investigated two-band models of graded-gap superlattices within the envelope-function approximation. Assuming that the gap varies linearly with spatial coordinate, we are able to find exact solutions of the corresponding Di[...]texto impreso
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We give a development up to the second order of strong solutions u of incompressible Navier-Stokes equations in R(n), n greater than or equal to 2 for several classes of initial data u(0). The first term is the solution h(t) = G(t) * u(0) of the[...]texto impreso
In this communication we develop and improve some of the results of [4] on the approximate controllability of several semilinear parabolic boundary value problems where the nonlinear term appears either at the second order parabolic equation or [...]texto impreso
We present some recent results on the mathematical study of a global two-dimensional stationary climate model. We prove the multiplicity of solutions for some values of a solar parameter. Then, we obtain a S-shaped bifurcation branch.texto impreso
In this comunication we present some results on the uniqueness and existence of BV solutions for the Cauchy-Dirichlet problem associated to the nonlinear diffusion equation b(u)(t) - div(\del u - k(b(u))e\(p-2)(del u - k(b(u))e)) + g(x,u) = f(t,[...]texto impreso
Díaz Díaz, Jesús Ildefonso ; Galiano, Gonzalo ; Padial Molina, Juan Francisco | Akademie Verlag GMBH | 1996We obtain the uniqueness of solutions of a nonlocal elliptic problem when the nonlinear terms at the right hand side are assumed to be prescribed. The problem arises in the study of the magnetic confinement of a plasma in a Stellarator device.
