Envíos recientes

  • SPDES: A Stepwise Solver for Teaching Partial Differential Equations 

    Galán-García, José Luis; Aguilera-Venegas, Gabriel; Rodriguez-Cielos, Pedro; Galán-García, María Ángeles; Padilla-Domínguez, Yolanda; [et al.] (2020-07-24)
    Partial Differential Equations (PDE) are an important topic within the Engineering Degrees syllabus. In addition, many students find some dificulties in the learning process of this topic. Therefore, the use of didactical ...
  • An Approach to Overtaking Station Layout Diagram Design Using Graphs 

    Roanes-Lozano, Eugenio; Galán-García, José Luis; Aguilera-Venegas, Gabriel (2020-07-24)
    The authors have approached in the past different railway engineering problems (e.g. [1,2]) and have developed software for the Spanish Railway Foundation [3], mainly using computer algebra systems (CAS). Now a CAS is used ...
  • A New Web-stepwise Solver for Ordinary Differential Equations 

    Galán-García, José Luis; Aguilera-Venegas, Gabriel; Le Goff, Morgan; Rodriguez-Cielos, Pedro; Galán-García, María Ángeles; [et al.] (2020-07-24)
    In this paper we introduce SODES (Step-wise Ordinary Differential Equations Solver) which is a new solver for Ordinary Dfferential Equations (ODE). SODES can be used not only as a solver but also as a tutorial for the ...
  • A Discrete-time Queueing System With Imperfect Information for the Server 

    Atencia-McKillop, Ivan; Galán-García, José Luis; Aguilera-Venegas, Gabriel; Rodriguez-Cielos, Pedro; Padilla-Domínguez, Yolanda; [et al.] (2020-07-24)
    We consider a discrete-time Geo=G=1=1 system in which a customer that finishes its fi rst essential service may opt to abandon the system, to receive a second optional service or to place at the head of the queue in order ...
  • Sojourn Times and Steady-state Probabilities in a Retrial Queueing System 

    Atencia-McKillop, Ivan (2020-07-24)
    This paper analyses a discrete-time Geo/G/1 retrial queue with general retrial times in which the arriving customers may opt to follow a LCFS-PR discipline or to join the orbit where it is contemplated the movement of ...
  • Einstein connections on Lorentzian spheres 

    Draper-Fontanals, Cristina (2020-03-05)
    A comparison between Riemannian and Lorentzian spheres as regards the existence of Einstein connections with skew-torsion
  • Octonions and exceptional Lie algebras 

    Draper-Fontanals, Cristina (2020-03-05)
    It is well known that octonions (both real and complex) are very involved in the structure of the exceptional Lie algebras. We will explore several aspects of this relationship: how octonions provide models of the exceptional ...
  • CLIL Implementation applied to Mathematics for Engineering 

    Rodriguez-Sanchez, Francisco Joaquin; Yélamos Guerra, María Salomé; Ruiz Rey, Francisco J. (2019-12-20)
    CLIL methodology aims to facilitate the learning of contents in a second language. Authors have tested an experience of implementation in English of these methods in subjects of Mathematics for Engineering at the University ...
  • Basic Ideals in evolution algebras 

    Cabrera Casado, Yolanda (2019-11-20)
    Recently a new type of genetic algebras, denominated evolution algebras, has emerged to enlighten the study of non-Mendelian genetics, which is the basic language of the molecular Biology. With the aim of finding invariants ...
  • A retrial discrete-time queueing system with actions in the server 

    Atencia-McKillop, Ivan (2019-10-31)
    This paper considers a discrete-time retrial queueing system with movements. The arriving customers can opt to go directly to the server obtaining immediately their service or to join the orbit. In the first case, if the ...
  • New functions for random samples generation using Stata 15 

    Aguilera-Venegas, Gabriel; Galán-García, José Luis; Galán-García, María Ángeles; Padilla-Domínguez, Yolanda; Rodriguez-Cielos, Pedro (2019-10-30)
    In the 2017 Spanish Stata Users Group meeting, held in Madrid on October 19th, we introduced some functions for generating random samples from continuous and discrete distributions using STATA 13. In this talk, we will ...
  • A new family of Einstein manifolds based on nonassociative structures 

    Draper-Fontanals, Cristina (2019-10-28)
    For each central simple symplectic triple system over the real numbers, the standard enveloping Lie algebra and the algebra of inner derivations of the triple provide a reductive pair related to a semi-Riemannian homogeneous ...
  • Using a CAS-developed random samples generator for teaching and research in probabilistic cellular automata and Statistics 

    Aguilera-Venegas, Gabriel; Galán-García, José Luis; Galán-García, María Ángeles; Rodriguez-Cielos, Pedro; Padilla-Domínguez, Yolanda; [et al.] (2019-07-25)
    Our group introduced random samples generation using a CAS, specifically Derive, in the Derive session of ACA 2009. This talk was extended in a paper published in The Derive Newsletter. In the year 2017 we presented a ...
  • Teaching the residue theorem and its applications with a CAS 

    Galán-García, José Luis; Aguilera-Venegas, Gabriel; Rodriguez-Cielos, Pedro; Padilla-Domínguez, Yolanda; Galán-García, María Ángeles (2019-07-25)
    The residue theorem is one of the most interesting result in Complex Analysis which allows not only computations in C, the Field of Complex Numbers, but also provides many applications in the Field of Real Numbers R. In ...
  • SFOPDES: A stepwise tutorial for teaching Partial Differential Equations using a CAS 

    Galán-García, José Luis; Aguilera-Venegas, Gabriel; Rodriguez-Cielos, Pedro; Padilla-Domínguez, Yolanda; Galán-García, María Ángeles; [et al.] (2019-07-25)
    Partial Differential Equations (PDE) are one of the most difficult topics that Engineering and Sciences students have to study in the different Math subjects in their degree. In this talk we introduce SFOPDES (Stepwise ...
  • Dynamic clustering of time series with Echo State Networks 

    Atencia-Ruiz, Miguel Alejandro; Stoean, Catalin; Stoean, Ruxandra; Rodriguez Labrada, Roberto; Joya-Caparrós, Gonzalo (2019-06-05)
    In this paper we introduce a novel methodology for unsupervised analysis of time series, based upon the iterative implementation of a clustering algorithm embedded into the evolution of a recurrent Echo State Network. The ...
  • Fostering the cooperative learning of mathematics in engineering schools through the "Teacher-Apprentice" group dynamics 

    Morales, Juan M.; Olea, Benjamín; Atencia-Ruiz, Miguel Alejandro; Madrid, Nicolás (2019-05-30)
    In this presentation, we report on the experience gained and the results obtained from an educational innovation project that has sought to introduce cooperative learning into the mathematics subjects of the first year of ...
  • Nonassociative structures and 3-Sasakian homogeneous manifolds 

    Draper Fontanals, Cristina; Draper-Fontanals, Cristina (2019-05-17)
    The 3-Sasakian homogeneous spaces are certain contact manifolds whose geometric structure is very well codified in Lie theoretical terms. This fact can be used to find interesting invariant affine connections, with nice ...
  • Graph theory with an introduction to algebraic graph theory 

    Márquez Pérez, Alberto (2018-09-20)
    Firstly, we shall start with an introduction to the main topics in Graph Theory with special emphasis in connectivity, colorability and planarity. The, we shall continue with the firsts concepts in Algebraic Graph Theory. ...
  • Data-driven distributionally robust optimization with Wasserstein metric, moment conditions and robust constraints 

    Esteban-Pérez, Adrián; Morales, Juan Miguel (2018-07-12)
    We consider optimization problems where the information on the uncertain parameters reduces to a finite data sample. Using the Wasserstein metric, a ball in the space of probability distributions centered at the empirical ...

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