Matemàtiques i Informàtica: Recent submissions
Now showing items 41-60 of 1007
Generació i difusió de mitjans sintètics en els mitjans de comunicació audiovisuals públics
Fer una proposta de directrius clares per a l'ús responsable d'imatges, vídeo i àudio sintètics a un mitjà de comunicació audiovisual públic, assegurant la transparència, l'ètica i la protecció dels drets dels individus. ...
Perazzo 3-folds and the weak Lefschetz property
We deal with Perazzo 3 -folds in $\mathbb{P}^4$, i.e. hypersurfaces $X=$ $V(f) \subset \mathbb{P}^4$ of degree $d$ defined by a homogeneous polynomial $f\left(x_0, x_1, x_2, u, v\right)=p_0(u, v) x_0+p_1(u, v) x_1+p_2(u, ...
Beurling type density theorems for weighted Lp spaces of entire functions
Set $\Delta=\partial^{2} / \partial_{z} \partial_{\bar{z}}$ and let $\varphi$ be a subharmonic function satisfying $0<m \leq \Delta \varphi(z) \leq M$ for all $z \in \mathbb{C},$ where $m$ and $M$ are positive constants. ...
Differentiable invariant manifolds of nilpotent parabolic points
We consider a map $F$ of class $C^{r}$ with a fixed point of parabolic type whose differential is not diagonalizable, and we study the existence and regularity of the invariant manifolds associated with the fixed point ...
Enabling cross-continent provider fairness in educational recommender systems
With the widespread diffusion of Massive Online Open Courses (MOOCs), educational recommender systems have become central tools to support students in their learning process. While most of the literature has focused on ...
Homogeneous numerical semigroups
We introduce the concept of homogeneous numerical semigroups and show that all homogeneous numerical semigroups with Cohen-Macaulay tangent cones are of homogeneous type. In embedding dimension three, we classify all ...
A sequence of polynomials with optimal condition number
We find an explicit sequence of univariate polynomials of arbitrary degree with optimal condition number. This solves a problem posed by Michael Shub and Stephen Smale in 1993.
Anisotropic Gaussian random fields: criteria for hitting probabilities and applications
We develop criteria for hitting probabilities of anisotropic Gaussian random fields with associated canonical pseudo-metric given by a class of gauge functions. This yields lower and upper bounds in terms of general notions ...
A parameterization method for the computation of invariant tori and their whiskers in quasi-periodic maps: explorations and mechanisms for the breakdown of hyperbolicity
In two previous papers [J. Differential Equations, 228 (2006), pp. 530 579; Discrete Contin. Dyn. Syst. Ser. B, 6 (2006), pp. 1261 1300] we have developed fast algorithms for the computations of invariant tori in quasi‐periodic ...
Introducció d'interiors d'ordre en lògiques abstractes
Let L = (S,C) be an abstract logic ( El]) . Using the methods of 131 we study the abstract logic . Lo = (S,C0) agsociated with 11,=1X C- S :X=C(X), f (XXX } for a given mapping f: S > S . We see that Lo preserves several ...
Effectiveness of a home-based telerehabilitation system in patients after total hip arthroplasty: study protocol of a randomized controlled trial
Background: The demand for total hip arthroplasty (THA) is quickly rising given the escalating global incidence of hip osteoarthritis, and it is widely accepted that the post-surgery rehabilitation is key to optimize ...
An effective algorithm to compute Mandelbrot sets in parameter planes.
McMullen in 2000 proved that copies of generalized Mandelbrot set are dense in the bifurcation locus for generic families of rational maps. We develop an algorithm to an effective computation of the location and size of ...
The Corona Property in Nevanlinna quotient algebras and interpolating sequences
Let $I$ be an inner function in the unit disk $\mathbb{D}$ and let $\mathcal{N}$ denote the Nevanlinna class. We prove that under natural assumptions, Bezout equations in the quotient algebra $\mathcal{N} / I \mathcal{N}$ ...
Splitting of the separatrices after a Hamiltonian-Hopf bifurcation under periodic forcing
We consider the effect of a non-autonomous periodic perturbation on a 2-dof autonomous system obtained as a truncation of the Hamiltonian-Hopf normal form. Our analysis focuses on the behaviour of the splitting of invariant ...
On the elliptic Stark Conjecture in higher weight
We study the special values of the triple product $p$-adic $L$-function constructed by Darmon and Rotger at all classical points outside the region of interpolation. We propose conjectural formulas for these values that ...
El vídeo sense barreres com a suport a la docència en educació superior
This communication introduces the project MQD 2010MQD00008 which consists in a pilot trial of editing an accessible video in an academic context. This project involves the creation of a video and a slide presentation to ...
Àlgebres quasi-hilbertianes
In this paper we study the algebras obtained by having the deduction theorem on the sets of two elements, calling them Q.H.-algebras .Adding to them the FREGE'S law, we obtain a Hilbert algebra ; adding to them the law (x ...
Generating Recommendations for Consensus Negotiations in Group Personalization Services
There are increasingly many personalization services in ubiquitous computing environments that involve a group of users rather than individuals. Ubiquitous commerce is one example of these environments. Ubiquitous commerce ...
The Hilbert-Kunz function of some quadratic quotients of the Rees algebra
Given a commutative local ring $(R, \mathfrak{m})$ and an ideal $I$ of $R$, a family of quotients of the Rees algebra $R[I t]$ has been recently studied as a unified approach to the Nagata's idealization and the amalgamated ...
Corridor Detection from Large GPS Trajectories Datasets
Given the widespread use of mobile devices that track their geographical location, it has become increasingly easy to acquire information related to users' trips in real time. This availability has triggered several studies ...
