Ara mostrant els elements 29-44 de 44

    On a Family of Degree 4 Blaschke Products 

    Canela Sánchez, Jordi (Data de defensa: 2015-03-18)

    This PhD thesis belongs to the area of discrete dynamical systems in the complex plane, i.e. the iteration of analytic functions in one complex variable. Given a rational map f from the Riemann sphere onto itself, we ...

    On Quasiperiodic Perturbations of Ordinary Differential Equations 

    Jorba i Monte, Àngel (Data de defensa: 1991-10-11)

    In this work we study several topics concerning quasi-periodic time-dependent perturbations of ordinary differential equations. This kind of equations appear as models in many applied problems of Celestial Mechanics, and ...

    On the Meromorphic Non-Integrability of Some Problems in Celestial Mechanics 

    Simon i Estrada, Sergi (Data de defensa: 2007-07-09)

    In this thesis, we present a proof of the meromorphic non-integrability for some problems arising from Celestial Mechanics, as well as a new necessary condition for partial integrability in a wider Hamiltonian setting. ...

    On-line norm synthesis for open Multi-Agent systems 

    Morales Matamoros, Javier (Data de defensa: 2016-02-02)

    Multi Agent Systems (MAS) are computerised systems composed of autonomous software agents that interact to solve complex problems. Within a MAS, agents require some mechanism to coordinate their activities. In the MAS ...

    Optimal Sobolev Embeddings in Spaces with Mixed Norm 

    Clavero, Nadia F. (Data de defensa: 2015-03-20)

    Este proyecto hace referencia a estimaciones, en espacios funcionales, que relacionan la norma de una función y la de sus derivadas. Concretamente, nuestro principal objetivo es estudiar las estimaciones clásicas de las ...

    Por qué la difusión de Arnold aparece genéricamente en los sistemas hamiltonianos con más de dos grados de libertad. 

    Delshams, Amadeu (Data de defensa: 1984-01-01)

    El teorema de Kolmogorov-Arnold-Moser no asegura la estabilidad cerca de los toros m-dimensionales que se conservan para hamiltonianos casi integrables con "m" grados de libertad. Puede aparecer una difusión de trayectorias ...

    Qualitative analysis of the anisotropic Kepler problem 

    Casasayas i Mas, Josefa (Data de defensa: 1984-01-01)

    The anisotropic Kepler problem was introduced by Gutzwiller as a classical mechanical system which approximates the following quantum mechanical system: the study of bound states of an electron near a donor impurity of a ...

    Random zero sets of analytic functions and traces of functions in Fock spaces 

    Buckley, Jeremiah (Data de defensa: 2013-06-06)

    Interpolating and sampling sequences in spaces of functions are classical subjects in complex and harmonic analysis. A sequence of points is said to be interpolating if, given any collection of values, we can find a function ...

    Real analysis in non-euclidean spaces: trees and spaces of homogeneous type 

    Garcia Domingo, Josep Lluís (Data de defensa: 2003-01-01)

    DE LA TESIS:<br/><br/>El contenido de esta tesis se enmarca dentro del Análisis Real. En particular, trata del estudio de ciertos problemas de la teoría de pesos, (una referencia clásica sobre esta teoría es el libro de ...

    Sequential image analysis for computer-aided wireless endoscopy 

    Drozdzal, Michal (Data de defensa: 2014-05-16)

    Wireless Capsule Endoscopy (WCE) is a technique for inner-visualization of the entire small intestine and, thus, offers an interesting perspective on intestinal motility. The two major drawbacks of this technique are: 1) ...

    Spaces of bandlimited functions on compact manifolds 

    Pridhnani, Bharti (Data de defensa: 2011-09-09)

    This monograph is structured in four chapters. In Chapter 1, we present the context of our problem and the main results proved in this work. We describe the asymptotic behaviour of the reproducing kernel and the ...

    Stochastic modelling of cellular populations: Effects of latency and feedback 

    Sánchez Taltavull, Daniel (Data de defensa: 2014-12-12)

    L'objectiu principal d'aquesta tesi doctoral és l'estudi de l'efecte de les fluctuacions en poblacions acoblades en sistemes biològics, on cèl·lules en estat latent juguen un paper important. Intentant trobar el significat ...

    The Parametrisation method for invariant manifolds of tori in Skew-product lattices and an entire transcendental family with a persistent Siegel disk 

    Berenguel Montoro, Rubén (Data de defensa: 2016-02-02)

    In this thesis we consider two different problems in the theory of dynamical systems. Dynamical systems cover a wide array of subjects, from finite dimensional to infinite dimensional, from analytic to statistical viewpoints ...

    The Primitive Function of an Exact Symplectomorphism. Variational principles, Converse KAM Theory and the problems of determination and interpolation 

    Haro, Àlex (Data de defensa: 1998-10-02)

    We have divided this thesis in four parts:<br/><br/>a) PART I: Exact symplectic geometry (introduction of the problems). This part contains the basic tools of symplectic geometry and outlines the four subjects that we have ...

    The Role and Usage of Libration Point Orbits in the Earth - Moon System 

    Alessi, Elisa Maria (Data de defensa: 2010-10-04)

    In this dissertation, we show the effectiveness of the exploitation of the Circular Restricted Three - Body Problem (CR3BP) in the Earth - Moon framework. We study the motion of a massless particle under the gravitational ...

    Transference theory between quasi-Banach function spaces with applications to the restriction of Fourier multipliers. 

    Rodríguez López, Salvador (Data de defensa: 2008-04-07)

    In the early 1970 fs, R. Coifman and G. Weiss, generalizing the techniques introduced by A. Calderon, developed a method for transferring abstract convolution type operators, defined on general topological groups, and their ...