Matemàtiques i Informàtica: Enviaments recents
Ara mostrant els elements 21-40 de 1007
On the Paraconsistent Companions of Involutive Fuzzy Logics that Preserve Non-falsity
<p>It is known that most systems of fuzzy logic trivialise in the</p><p>presence of contradictory information of the type {φ, ¬φ}, since with the</p><p>standard truth-preserving [0, 1]-valued semantics, there is no ...
Instanton bundles vs Ulrich bundles on projective spaces
We relate the existence of rank $r$ Ulrich bundles on a Veronese 3-fold $\left(\mathbb{P}^3, \mathcal{O}_{\mathbb{P}^3}(d)\right)$ with the existence of rank $r$ instanton bundles on $\mathbb{P}^3$. This relation will allow ...
Clifford's theorem for coherent systems on surfaces with Kodaira dimension $\kappa \leq 0$
Let $X$ be a smooth irreducible projective surface with Kodaira dimension $\kappa \leq 0$. The aim of this paper is to establish a version of Clifford's theorem for coherent systems on $X$.
Brill-Noether theory of stable vector bundles on ruled surfaces
Let $X$ be a ruled surface over a nonsingular curve $C$ of genus $g \geq 0$. Let $M_H:=M_{X, H}\left(2 ; c_1, c_2\right)$ be the moduli space of $H$-stable rank 2 vector bundles $E$ on $X$ with fixed Chern classes $c_i:=c_i(E)$ ...
Degree-preserving Gödel logics with an involution: intermediate logics and (ideal) paraconsistency
In this paper, we study intermediate logics between the logic $\mathrm{G}_{\sim}^{\leq}$, the degree-preserving companion of Gödel fuzzy logic with involution $\mathrm{G}_{\sim}$, and classical propositional logic CPL, as ...
Structural completeness in many-valued logics with rational constants
The logics $\mathbf{R} \mathbf{\L}, \mathbf{R} \mathbf{P}$, and $\mathbf{R G}$ have been obtained by expanding $\{L}$ukasiewicz logic $\mathbf{L}$, product logic $\mathbf{P}$, and Gödel-Dummett logic $\mathbf{G}$ with ...
On the Non-falsity and Threshold Preserving Variants of MTL Logics
In this paper we study the definition and axiomatisation of non-falsity preserving and threshold preserving companions of several extensions of the Monoidal t-norm based fuzzy logic MTL. More in detail, we first extend ...
Sampling and interpolating sequences in finite dimensional spaces
We illustrate how the use of techniques from optimal transport on the study of sampling and interpolation families in finite dimensional spaces provide alternative descriptions of these sequences.
Activity Theory in Digital Game-Based Learning: A Geometry Case Study
Digital Game-Based Learning (DGBL) is a complementary methodology to tra-ditional instruction, yet it often faces conceptual and practical limitations inevolving educational environments. These include the closed nature ...
Mirando hacia el futuro: problemas de frontera libre
Las ecuaciones en derivadas parciales (EDPs) son un campo de investigación muy amplio y activo, con importantes conexiones con otros campos como el análisis armónico, la geometría diferencial, el cálculo de variaciones, ...
On the role of the fast oscillations in the secular dynamics of the lunar coplanar perturbation on Galileo satellites
Motivated by the practical interest in the third-body perturbation as a natural cleaning mechanism for high-altitude Earth orbits, we investigate the dynamics stemming from the secular Hamiltonian associated with the lunar ...
On the moduli space of simple sheaves on singular K3 surfaces
Mukai proved that the moduli space of simple sheaves on a smooth projective K3 surface is symplectic, and in [6] we gave two constructions allowing one to construct new locally closed Lagrangian/isotropic subspaces of the ...
Homotopy BV-algebras in Hermitian geometry
We show that the de Rham complex of any almost Hermitian manifold carries a natural commutative -algebra structure satisfying the degeneration property. In the almost Kähler case, this recovers Koszul's BV-algebra, defined ...
Multi-Objective Reinforcement Learning for Designing Ethical Multi-Agent Environments
This paper tackles the open problem of value alignment in multi-agent systems. In particular, we propose an approach to build an ethical environment that guarantees that agents in the system learn a joint ethically-aligned ...
Boundary dynamics in unbounded Fatou components.
We study the behaviour of a transcendental entire map $f: \mathbb{C} \rightarrow \mathbb{C}$ on an unbounded invariant Fatou component $U$, assuming that infinity is accessible from $U$. It is wellknown that $U$ is simply ...
Overcoming Diverse Undesired Effects in Recommender Systems: A Deontological Approach
In today’s digital landscape, recommender systems have gained ubiquity as a means of directing users towards personalized products, services, and content. However, despite their widespread adoption and a long track of ...
AGN feedback in an infant galaxy cluster: LOFAR- Chandra view of the giant FRII radio galaxy J103025+052430 at z = 1.7
In the nearby universe, jets from active galactic nuclei (AGN) are observed to have a dramatic impact on their surrounding extragalactic environment. The effect of jets at high redshift (z > 1.5) is instead much more poorly ...
X-ray properties and obscured fraction of AGN in the J1030 Chandra field
The 500ks Chandra ACIS-I observation of the field around the z = 6.31 quasar SDSS J1030+0524 is currently the fifth deepest extragalactic X-ray survey. The rich multi-band coverage of the field allowed an effective ...
Heavily obscured AGN detection: A radio versus X-ray challenge
Context. In the supermassive black hole (SMBH)-galaxy coevolution scenario, heavily obscured active galactic nuclei (AGN) represent a fundamental phase of SMBH growth during which most of the BH mass is accreted and the ...
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 ...
