Matemàtiques i Informàtica: Enviaments recents
Ara mostrant els elements 241-260 de 1007
On 1:3 Resonance Under Reversible Perturbations of Conservative Cubic Hénon Maps
We consider reversible nonconservative perturbations of the conservative cubic Hénon maps $H^{\pm}_3: \bar x=y, \bar y=−x+M_1+M_2 y \pm y^3$ and study their influence on the 1:3 resonance, i. e., bifurcations of fixed ...
On the 'hidden' harmonics associated to best approximants due to quasi-periodicity in splitting phenomena
The effects of quasi-periodicity on the splitting of invariant manifolds are examined. We have found that some harmonics, that could be expected to be dominant in some ranges of the perturbation parameter, actually are ...
Traces of functions in Fock spaces on lattices of critical density
Following a scheme of Levin we describe the values that functions in Fock spaces take on lattices of critical density in terms of both the size of the values and a cancelation condition that involves discrete versions of ...
Stable sampling and Fourier multipliers
We study the relationship between stable sampling sequences for bandlimited functions in $L^p(\R^n)$ and the Fourier multipliers in $L^p$. In the case that the sequence is a lattice and the spectrum is a fundamental domain ...
Rank-two vector bundles on non-minimal ruled surfaces
We continue previous work by various authors and study the birational geometry of moduli spaces of stable rank-two vector bundles on surfaces with Kodaira dimension $ -\infty $. To this end, we express vector bundles as ...
Weight filtration on the cohomology of complex analytic spaces
We extend Deligne's weight filtration to the integer cohomology of complex analytic spaces (endowed with an equivalence class of compactifications). In general, the weight filtration that we obtain is not part of a mixed ...
Remarks on stationary and uniformly-rotating vortex sheets: rigidity results
In this paper, we show that the only solution of the vortex sheet equation, either stationary or uniformly rotating with negative angular velocity $\Omega$, such that it has positive vorticity and is concentrated in a ...
Una nota sobre la topología y el flujo en el problema restringido de tres cuerpos
We study the topology of the unbounded region of the invariant manifolds with fixed values of the Jacobi constant C of the two-body problem, when C>3 . We describe the hamiltonian flow on this manifolds. TWo main consequences ...
Singularidades unidimensionales de una superficie algebraica
as singularidades de una variedad algebraica proyectiva V constituyen un fenómeno estrechamente ligado a la multiplicidad de intersección de V con otras variedades algebraicas. Nos proponemos realizar aqui un análisis de ...
Resolución del problema de Cauchy relativo a una clase de ecuaciones en derivadas parciales de tercer orden cuasi-lineales y de tipo hiperbólico (II)
Este trabajo complementa otros tres anteriores nuestros ([lJ, [2] y [3J), y en él se plantea y resuelve localmente el Problema de CAUCHY relativo a la ecuación en derivadas parciales de 3.er orden, cuasi-lineal y de tipo ...
Normal Forms and Sternberg Conjugation Theorems for Infinite Dimensional Coupled Map Lattices
In this paper we present local Sternberg conjugation theorems near attracting fixed points for lattice systems. The interactions are spatially decaying and are not restricted to finite distance. The conjugations obtained ...
Medigan: A Python library of pretrained generative models for medical image synthesis
Purpose: Deep learning has shown great promise as the backbone of clinical decision support systems. Synthetic data generated by generative models can enhance the performance and capabilities of data-hungry deep learning ...
Enhancing sentient embodied conversational agents with machine learning
Within the area of intelligent User Interfaces, we propose what we call Sentient Embodied Conversational Agents (SECAs): virtual characters able to engage users in complex conversations and to incorporate sentient capabilities ...
On restriction of maximal multipliers in weighted settings
We obtain restriction results of K. De Leeuw's type for maximal operators defined through Fourier multipliers of either strong or weak type for weighted $ L^p$ spaces with $ 1\le p<\infty $. Applications to the case of ...
On Ito's formula for elliptic diffusion processes
Bardina and Jolis [Stochastic process. Appl. 69 (1997) 83-109] prove an extension of Ito's formula for F(Xt, t), where F(x, t) has a locally square-integrable derivative in x that satisfies a mild continuity condition in ...
Multi-Modal Deep Hand Sign Language Recognition in Still Images Using Restricted Boltzmann Machine
In this paper, a deep learning approach, Restricted Boltzmann Machine (RBM), is used to perform automatic hand sign language recognition from visual data. We evaluate how RBM, as a deep generative model, is capable of ...
Characterization of Schatten class Hankel operators on weighted Bergman spaces
We completely characterize the simultaneous membership in the Schatten ideals $S_{p,} 0 < p < \infty$ of the Hankel operators $H_{f}$ and $H_{\overline{f}}$ on the Bergman space, in terms of the behavior of a local mean ...
A Robust Solution to Variational Importance Sampling of Minimum Variance
Importance sampling is a Monte Carlo method where samples are obtained from an alternative proposal distribution. This can be used to focus the sampling process in the relevant parts of space, thus reducing the variance. ...
Boundary multipliers of a family of Möbius invariant spaces
For $1<p<\infty$ and $0<s<1$, we consider the function spaces $\mathcal{Q}_s^p(\mathbb{T})$ that appear naturally as the space of boundary values of a certain family of analytic Möbius invariant function spaces on the the ...
