Matemàtiques i Informàtica: Enviaments recents
Ara mostrant els elements 341-360 de 1007
Un recíproco de un teorema de A. Wilansky
In this paper, we try to state a reciprocal of . a result of A. Wilansky : The dual of a Mazur space, provided with the topology of convergence on null sequences, is complete. Until now, we have proved this converse when ...
Small Hankel operators on generalized weighted Fock spaces
In this work we characterize the boundedness, compactness and membership in the Schatten class of small Hankel operators on generalized weighted Fock spaces $F^{p,\ell}_\alpha(\omega)$ associated to an $\mathcal{A}^\ell_p$ ...
Reproducing kernel estimates, bounded projections and duality on large weighted Bergman spaces
We obtain certain estimates for the reproducing kernels of large weighted Bergman spaces. Applications of these estimates to boundedness of the Bergman projection on $L^p(\mathbb{D}, \omega^{p/2})$, complex interpolation ...
Reliable computation of robust response tori on the verge of breakdown
We prove the existence and local uniqueness of invariant tori on the verge of breakdown for two systems: the quasi-periodically driven logistic map and the quasi-periodically forced standard map. These systems exemplify ...
Iterated logarithm law for anticipating stochastic differential equations
We prove a functional law of iterated logarithm for the following kind of anticipating stochastic differential equations $$ \xi_t^u=X_0^u+\frac{1}{\sqrt{\log \log u}} \sum_{j=1}^k \int_0^t A_j^u\left(\xi_s^u\right) \circ ...
A picture of solar-sail heteroclinic enhanced connections between lissajous libration point orbits
The dynamics of solar-sail maneuvers are conceptually different from classical control maneuvers where one considers impulsive changes in the velocity of a spacecraft. Solar-sail orbits are continuous in both position and ...
Escaping points in the boundaries of baker domains
We study the dynamical behaviour of points in the boundaries of simply connected invariant Baker domains $U$ of meromorphic maps $f$ with a finite degree on $U$. We prove that if $f|_U$ is of hyperbolic or simply parabolic ...
Division and extension in weighted Bergman-Sobolev spaces
Let D be a bounded strictly pseudoconvex domain of Cn with C 8 boundary and Y = {z; u1(z) = ... = ul(z) = 0} a holomorphic submanifold in the neighbourhood of D', of codimension l and transversal to the boundary of D. In ...
Marcinkiewicz-Zygmund inequalities
We study a generalization of the classical Marcinkiewicz-Zygmund inequalities. We relate this problem to the sampling sequences in the Paley-Wiener space and by using this analogy we give sharp necessary and sufficient ...
Generic regularity of free boundaries for the obstacle problem
The goal of this paper is to establish generic regularity of free boundaries for the obstacle problem in $\mathbb{R}^n$. By classical results of Caffarelli, the free boundary is $C^{\infty}$ outside a set of singular points. ...
Stochastic delay differential equations driven by fractional Brownian motion with Hurst parameter H 1/2
We consider the Cauchy problem for a stochastic delay differential equation driven by a fractional Brownian motion with Hurst parameter H>¿. We prove an existence and uniqueness result for this problem, when the coefficients ...
Conditions of angelic type in function spaces
This paper deals with a class of topological spaces in which α-compactness and compactness coincide and the tightness of a compact subset is less or equal than α, a being an infinite cardinal number. This class is a natural ...
Threefolds with nef anticanonical bundles
In this paper we study the global structure of projective threefolds X whose anticanonical bundle K is nef.
Localizing with respect to self-maps of the circle
We describe a general procedure to construct idempotent functors on the pointed homotopy category of connected $ {\text{CW}}$-complexes, some of which extend $ P$-localization of nilpotent spaces, at a set of primes $ P$. ...
Gaussian analytic functions in the unit ball
We study some properties of hyperbolic Gaussian analytic functions of intensity $L$ in the unit ball of $\mathbb{C}^n$. First we deal with the asymptotics of fluctuations of linear statistics as $L \rightarrow \infty$. ...
Modelling Functional Shifts in Two-Species Hypercycles
Research on hypercycles focuses on cooperative interactions among replicating species, including the emergence of catalytic parasites and catalytic shortcircuits. Further interactions may be expected to arise in cooperative ...
Les martingales i les seves aplicacions des d'una perspectiva històrica
Segons sembla, el mot 'martingala' prové del nom provençal de la ciutat francesa de Martigues. Hi ha un allarga història sobre aquest mot i el seu ús en el context dels jocs d'atzar. No ens proposem aquí d'entrar en els ...
Cadenes de Sales discretes
The Sales algebras are the substract of some positive implicational calculi . As a first aproximation to their representation we study the Sales algebras that are discrete and linear . In this paper we present a caracteritzation ...
Funciones abeloides y aplicaciones a ecuaciones en derivadas parcial es de cuarto orden
EI estudio de las ecuaciones en derivadas parciales, cuyas soluciones estén en el campo real, implica considerar los problemas adecuados a cada ecuación; asi para las de 2º orden y con dos variables independientes resultan ...
