Mostrando ítems 1-7 de 7
Perarnau Llobet, Guillem (Fecha de defensa: 2013-10-01)
En aquesta tesi s'estudien diferents problemes en el camp de la combinatòria i la teoria de grafs, utilitzant el mètode probabilístic. Aquesta tècnica, introduïda per Erdős , ha esdevingut una eina molt ...
Ruiz Rodriguez, Alexandre (Fecha de defensa: 2013-07-22)
The present thesis deals with primitives related to the eld of distributed cryptography. First, we study signcryption schemes, which provide at the same time the functionalities of encryption and ...
Farràs Ventura, Oriol (Fecha de defensa: 2010-07-27)
This thesis is dedicated to the study of secret sharing schemes, which are cryptographic methods to share information in a secure way. The topics that are considered in the thesis are two of the main ...
Prieto Martínez, Pere Daniel (Fecha de defensa: 2014-10-02)
Geometrical physics is a relatively young branch of applied mathematics that was initiated by the 60's and the 70's when A. Lichnerowicz, W.M. Tulczyjew and J.M. Souriau, among many others, began to ...
Teixidó Roman, Miguel (Fecha de defensa: 2015-03-27)
The Marle-Guillemin-Sternberg (MGS) model is an extremely important tool for the theory of Hamiltonian actions on symplectic manifolds. It has been extensively used to prove many local results both in ...
Termens Perarnau, Maria Assumpció (Fecha de defensa: 2014-03-07)
Compared to the conventional ground measurement of gravity, airborne gravimetry is more efficient and cost-effective. Especially, the combination of GPS and INS is known to show very good performances ...
Vena Cros, Lluís (Fecha de defensa: 2012-07-02)
This thesis presents some contributions in additive combinatorics and arithmetic Ramsey theory. More specifically, it deals with the interaction between combinatorics, number theory and additive ...