Matemàtiques i Informàtica: Enviaments recents
Ara mostrant els elements 41-60 de 1007
Isogenies of Jacobians
By studying the infinitesimal variations of the Hodge structure and a generalization of the classical Babbage-Enriques-Petri theorem, we prove that the Jacobian variety of a generic element of a codimension k subvariety ...
‘t Hooft bundles on the complete flag threefold and moduli spaces of instantons
In this work we study the moduli spaces of instanton bundles on the flag twistor space $F:=F(0,1,2)$. We stratify them in terms of the minimal twist supporting global sections and we introduce the notion of (special) 't ...
Anàlisi de missió d'un satèl·lit artificial
Cap a mitjans de l'any 1995 l'Agència Espacial Europea (ESA), dins el seu programa científic, té previst el llançament de satèl·lit SOHO (Solar and Heliopheric Observatory) en un projecte conjunt amb l'Agència Espacial ...
Stochastic delay equations with non-negativity constraints driven by fractional Brownian motion
In this note we prove an existence and uniqueness result for the solution of multidimensional stochastic delay differential equations with normal reflection. The equations are driven by a fractional Brownian motion with ...
Artificial intelligence to improve polyp detection and screening time in colon capsule endoscopy
Colon Capsule Endoscopy (CCE) is a minimally invasive procedure which is increasingly being used as an alternative to conventional colonoscopy. Videos recorded by the capsule cameras are long and require one or more experts' ...
Localization of nilpotent fibre maps
The theory of Jocalization first introduced in topology by D. Sullivan [6] has been exploited by many topologists, e.g. A.K. Bousfield - D.M. Kan [1], P. Hilton G. Mislin J. Roitberg [2], and works particularly well in the ...
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 ...
Inhomogeneous Poisson processes in the disk and interpolation
We investigate different geometrical properties, related to Carleson measures and pseudo-hyperbolic separation, of inhomogeneous Poisson point processes on the unit disk. In particular, we give conditions so that these ...
On vectorial polynomials and coverings in characteristic 3
For K a field containing the finite field $\mathbb{F}_9$ we give explicitly the whole family of Galois extensions of K with Galois group $2S_4 * Q_8$ or $2S_4 * D_8$ and determine the discriminant of such an extension.
A note on interpolation by bloch functions
We show that the positive part of a result on interpolation by Bloch functions due to B. Boe and A. Nicolau is a direct consequence of C. Sundberg's description of the traces of BMOA functions on interpolating sequences for H ∞ .
