MA  Artículos
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Rigidity results for complete spacelike submanifolds in plane fronted waves
(Springer, 20220908)New rigidity results for complete noncompact spacelike submanifolds of arbitrary codimension in plane fronted waves are obtained. Under appropriate assumptions, we prove that a complete spacelike submanifold in these ... 
Inner Ideals of Real Simple Lie Algebras
(Springer, 20220718)A classification up to automorphism of the inner ideals of the real finitedimensional simple Lie algebras is given, jointly with precise descriptions in the case of the exceptional Lie algebras. 
Fuzzy closure systems: Motivation, definition and properties
(Elsevier, 202209)The aim of this paper is to extend closure systems from being crisp sets with certain fuzzy properties to proper fuzzy sets. The presentation of the paper shows a thorough discussion on the different alternatives that ... 
Too Many Males or Too Many Females? Classroom Sex Ratio, Life History Strategies and RiskTaking Behaviors
(Springer, 20220601)Prior research finds that sex ratio, defined as the proportion of males and females in a given context, is related to engagement in risktaking behaviors. However, most research operationalizes sex ratio at a local context ... 
Fuzzy closure relations
(Elsevier, 20220525)The concept of closure operator is key in several branches of mathematics. In this paper, closure operators are extended to relational structures, more specifically to fuzzy relations in the framework of complete fuzzy ... 
Kitainik axioms do not characterize the class of inclusion measures based on contrapositive fuzzy implications
(Elsevier, 20220517)In this short communication, we refute the conjecture by Fodor and Yager from [5] that the class of inclusion measures proposed by Kitainik coincides with that of inclusion measures based on contrapositive fuzzy implications. ... 
Smart Sensorization Using Propositional Dynamic Logic
(IOAPMPDI, 20220520)The current high energy prices pose a serious challenge, especially in the domestic economy. In this respect, one of the main problems is obtaining domestic hot water. For this reason, this article develops a heating system ... 
Conformal Vector Fields and Null Hypersurfaces
(Springer, 20220503)We give conditions for a conformal vector field to be tangent to a null hypersurface. We particularize to two important cases: a Killing vector field and a closed and conformal vector field. In the first case, we obtain a ... 
An exact dynamic programming approach to segmented isotonic regression
(Elsevier, 2021)This paper proposes a polynomialtime algorithm to construct the monotone stepwise curve that minimizes the sum of squared errors with respect to a given cloud of data points. The fitted curve is also constrained on the ... 
Quasiclosed elements in fuzzy posets
(ELSEVIER, 202204)We generalize the notion of quasiclosed element to fuzzy posets in two stages: First, in the crisp style in which each element in a given universe either is quasiclosed or not. Second, in the graded style by defining ... 
Chains in evolution algebras
(ELSEVIER, 20210801)In this work we approach threedimensional evolution algebras from certain constructions performed on twodimensional algebras. More precisely, we provide four different constructions producing threedimensional evolution ... 
Costdriven screening of network constraints for the unit commitment problem
(The Institute of Electrical and Electronics Engineers (IEEE), 20220316)In an attempt to speed up the solution of the unit commitment (UC) problem, both machinelearning and optimizationbased methods have been proposed to lighten the full UC formulation by removing as many superfluous lineflow ... 
On projection methods for functional time series forecasting
(ScienceDirect, 202205)Two nonparametric methods are presented for forecasting functional time series (FTS). The FTS we observe is a curve at a discretetime point. We address both onestepahead forecasting and dynamic updating. Dynamic updating ... 
A discretetime queueing system with three different strategies
(Elsevier, 202109)We consider a discretetime Geo/G/1/inf system in which a customer that finishes its first essential service may opt to abandon the system, to receive a second optional service or to go at the head of the queue in order ... 
Distributionally robust stochastic programs with side information based on trimmings
(Springer, 202111)We consider stochastic programs conditional on some covariate information, where the only knowledge of the possible relationship between the uncertain parameters and the covariates is reduced to a finite data sample of ... 
Mean curvature of spacelike submanifolds in a Brinkmann spacetime
(2021)Several geometric properties of complete spacelike submanifolds, with codimension at least two, in a Brinkmann spacetime are shown from natural assumptions involving the mean curvature vector field $\mcv$ of the spacelike ... 
Inverse optimization with kernel regression: Application to the power forecasting and bidding of a fleet of electric vehicles
(Elsevier, 202110)This paper considers an aggregator of Electric Vehicles (EVs) who aims to learn the aggregate power of his/her fleet while also participating in the electricity market. The proposed approach is based on a datadriven inverse ... 
Partitionbased distributionally robust optimization via optimal transport with order cone constraints
(Springer, 2021)In this paper we wish to tackle stochastic programs affected by ambiguity about the probability law that governs their uncertain parameters. Using optimal transport theory, we construct an ambiguity set that exploits the ... 
Electricity CostSharing in Energy Communities Under Dynamic Pricing and Uncertainty
(IEEE, 20210215)Most of the prosumers nowadays are constrained to trade only with the supplier under a flat tariff or dynamic timeofuse price signals. This paper models and discusses the costsaving benefits of flexible prosumers as ... 
Featuredriven improvement of renewable energy forecasting and trading
(20200226)Inspired from recent insights into the common ground of machine learning, optimization and decisionmaking, this paper proposes an easytoimplement, but effective procedure to enhance both the quality of renewable energy ...