Browsing Former Research Lines by Title
Now showing items 82101 of 220

Fine structure of spectral properties for random correlation matrices: An application to financial markets
(20111231)We study some properties of eigenvalue spectra of financial correlation matrices. In particular, we investigate the nature of the large eigenvalue bulks which are observed empirically, and which have often been regarded ... 
Finite time blowup and condensation for the bosonic Nordheim equation
(20141231)The homogeneous bosonic Nordheim equation is a kinetic equation describing the dynamics of the distribution of particles in the space of moments for a homogeneous, weakly interacting, quantum gas of bosons. We show the ... 
Finite time blowup for the bosonic Nordheim equation
(20151231)The homogeneous bosonic Nordheim equation is a kinetic equation describing the dynamics of the distribution of particles in the space of moments for a homogeneous, weakly interacting, quantum gas of bosons. We show the ... 
Fitting secondorder acyclic marked markovian arrival processes
(20131231)Markovian Arrival Processes (MAPs) are a tractable class of pointprocesses useful to model correlated time series, such as those commonly found in network traces and system logs used in performance analysis and reliability ... 
Flux identification for 1d scalar conservation laws in the presence of shocks
(20111231)We consider the problem of flux identification for 1d scalar conservation laws formulating it as an optimal control problem. We introduce a new optimization strategy to compute numerical approximations of minimizing fluxes. ... 
Fracture Surfaces and the Regularity of Inverses for BV Deformations
(20111231)Motivated by nonlinear elasticity theory, we study deformations that are approximately differentiable, orientationpreserving and onetoone almost everywhere, and in addition have finite surface energy. This surface energy ... 
Full characterization of the fractional Poisson process
(20111231)The fractional Poisson process (FPP) is a counting process with independent and identically distributed interevent times following the MittagLeffler distribution. This process is very useful in several fields of applied ... 
Generation of twodimensional water waves by moving bottom disturbances
(20141231)In this study we investigate the potential and limitations of the wave genera tion by disturbances moving at the bottom. More precisely, we assume that the wavemaker is composed of an underwater object of a given shape ... 
Global Attractor for a Generalized Discrete Nonlinear Schrödinger Equation
(20141231)A generalized discrete nonlinear Schr√∂dinger equation (Formula presented.) with longrange interactions in weighted spaces (Formula presented.) is considered. Under suitable assumptions on the coupling constants J(m), the ... 
Global exact controllability in infinite time of Schrodinger equation: multidimensional case
(20141231)In this paper, we study the problem of controllability of Schrödinger equation. We prove that the system is exactly controllable in infinite time to any po sition. The proof is based on an inverse mapping theorem for ... 
Gradientbased optimization techniques for the design of static controllers for Markov jump linear systems with unobservable modes
(20141231)The paper formulates the static control problem of Markov jump linear systems, assuming that the controller does not have access to the jump variable. We derive the expression of the gradient for the cost motivated by the ... 
Hardtype inequalities for $\Delta_{\lambda}$Laplacians
(20151231)We derive Hardytype inequalities for a large class of subelliptic operators that belong to the class of (Formula presented.) Laplacians and find explicit values for the constants involved. Our results generalize previous ... 
Hardy inequalities, observability, and control for the wave and schrödinger equations with singular potentials
(20091231)We address the question of exact controllability of the wave and Schrodinger equa\tions perturbed by a singular inversesquare potential. Exact boundary controllability is proved in the range of subcritical coefficients ... 
Hardy inequality and Pohozaev identity for operators with boundary singularities: Some applications
(20111231)We consider the Schrödinger operator Aλ:=δλ/x2, λ∈R, when the singularity is located on the boundary of a smooth domain Ω⊂RN, N≥1.The aim of this Note is two folded. Firstly, we justify the extension of the classical ... 
Hardy type inequalities for $\Delta_{\lambda}$Laplacians
(20160101)We derive Hardytype inequalities for a large class of subelliptic operators that belong to the class of $\Delta_{\lambda}$Laplacians and find explicit values for the constants involved. Our results generalize previous ... 
High frequency wave packets for the Schrödinger equation and its numerical approximations [Paquets d'ondes à haute fréquence pour l'équation de Schrödinger et ses approximations numériques]
(20111231)We build Gaussian wave packets for the linear Schrödinger equation and its finite difference space semidiscretization and illustrate the lack of uniform dispersive properties of the numerical solutions as established in ... 
Homogenization of fiber reinforced brittle materials: The extremal cases
(20091231)We analyze the behavior of a fragile material reinforced by a reticulated elastic unbreakable structure in the case of antiplane shear. The microscopic geometry of this material is described by means of two small parameters: ... 
Homogenization of the Neumann problem in perforated domains: An alternative approach
(20111231)The main result of this paper is a compactness theorem for families of functions in the space SBV (Special functions of Bounded Variation) defined on periodically perforated domains. Given an open and bounded set Ω n, and ... 
Identification of the class of initial data for the insensitizing control of the heat equation
(20091231)This paper is devoted to analyze the class of initial data that can be insensitized for the heat equation. This issue has been extensively addressed in the literature both in the case of complete and approximate insensitization ... 
Incompressible limit of the nonisentropic NavierStokes equations with wellprepared initial data in threedimensional bounded domains
(20111231)This paper studies the incompressible limit of the nonisentropic NavierStokes equations for viscous polytropic flows with zero thermal coefficient in threedimensional bounded C4domains. The uniform estimates in the ...