Matemàtiques i Informàtica: Recent submissions
Now showing items 101-120 of 1007
Forgetful Swarm Optimization for Astronomical Observation Scheduling
In this paper, we propose a novel metaheuristic algorithm called Forgetful Swarm Optimization(FSO) for Astronomical Observation Scheduling (AOS), a type of combinatorial optimization problemdefined by the tasks and constraints ...
Bounds of the number of rational maps between varieties of general type
We give a bound for the number of rational maps between algebraic varieties of general type under mild hypothesis on the canonical map. We use an idea inspired by Tanabe's work. Instead of attaching a morphism of Hodge ...
A Cognitively Inspired Clustering Approach for Critique-Based Recommenders
The purpose of recommender systems is to support humans in the purchasing decision-making process. Decision-making is a human activity based on cognitive information. In the field of recommender systems, critiquing has ...
Classification of linear skew-products of the complex plane and an affine route to fractalization
Linear skew products of the complex plane, \left.\begin{array}{l} \theta \mapsto \theta+\omega \\ z \mapsto a(\theta) z \end{array}\right\} where $\theta \in \mathrm{T}, z \in \mathbb{C}, \frac{\omega}{2 \pi}$ is irrational, ...
Mathematics in Catalonia: 1996-2002
The aim of this article is to present the main conclusions of the Report on research in Catalonia for the area of mathematics**. The report was prepared by Joaquim Bruna, Marta Sanz, Joan de Solà-Morales and the author of ...
Topología grassmanniana sobre los ideales cerrados de codimensión finita en un álgebra de Banach conmutativa.
El objeto de esta nota es el de dar una construcción natural de una topología para el conjunto de los ideales cerrados de codimensión n de un álgebra de Banach conmutativa, dando una condición necesaria y suficiente ...
Arithmetically Cohen-Macaulay bundles on cubic threefolds
We study arithmetically Cohen-Macaulay bundles on cubic threefolds by using derived category techniques. We prove that the moduli space of stable Ulrich bundles of any rank is always non-empty by showing that it is birational ...
Linear statistics of determinantal point processes and norm representations
We study the asymptotic behavior of the fluctuations of smooth and rough linear statistics for determinantal point processes on the sphere and on the Euclidean space. The main tool is the generalization of some norm ...
On Morita weak equivalences of simplicial algebraic theories and operads
Generalizing a classical result of Dwyer and Kan for simplicial categories, we characterize the morphisms of multi-sorted simplicial algebraic theories and simplicial coloured operads which induce a Quillen equivalence ...
Absorbing sets and Baker domains for holomorphic maps
We consider holomorphic maps $f: U \rightarrow U$ for a hyperbolic domain $U$ in the complex plane, such that the iterates of $f$ converge to a boundary point $\zeta$ of $U$. By a previous result of the authors, for such ...
Rational cohomology tori
We study normal compact varieties in Fujiki's class $\mathcal{C}$ whose rational cohomology ring is isomorphic to that of a complex torus. We call them rational cohomology tori. We classify, up to dimension three, those ...
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 ...
On the dimension of Voisin sets in the moduli space of abelian varieties
We study the subsets $V_k(A)$ of a complex abelian variety $A$ consisting in the collection of points $x \in A$ such that the zero-cycle $\{x\}-\left\{0_A\right\}$ is $k$-nilpotent with respect to the Pontryagin product ...
On invariant rank two vector bundles on $\mathbb{P}^2$
In this paper we characterize the rank two vector bundles on $\mathbb{P}^2$ which are invariant under the actions of the parabolic subgroups $G_p:=\operatorname{Stab}_p(\mathrm{PGL}(3))$ fixing a point in the projective ...
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. ...
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 ...
The origin of the period-2T/7 quasi-breathing in disk-shaped Gross-Pitaevskii breathers
We address the origins of the quasi-periodic breathing observed in [Phys. Rev.\ X vol. 9, 021035 (2019)] in disk-shaped harmonically trapped two-dimensional Bose condensates, where the quasi-period $T_{\text{quasi-breath ...
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 ...
Resolución mediante aproximaciones sucesivas de un problema de contorno en un tipo de ecuaciones diferenciales de cuarto orden
El presente trabajo trata de la resolución de un problema de contorno en un tipo de ecuaciones diferenciales lineales y homogéneas de cuarto orden, con dos parámetros independientes, en el que el coeficiente de la variable ...
