Ara es mostren els items 74-93 de 187

    • PageRank: A different point of view 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José; Mitjana Riera, Margarida (2022)
      Text en actes de congrés
      Accés obert
    • Perturbations of discrete elliptic operators 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (Elsevier, 2015)
      Article
      Accés obert
    • Perturbing networks 

      Mitjana Riera, Margarida; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2012)
      Comunicació de congrés
      Accés obert
      Semi-definite positive Schrödinger operators on finite connected networks are particular examples of a general class of self-adjoint operators called elliptic operators. Any elliptic operator defines an automorphism on the ...
    • Potential Theory for boundary value problems on finite networks 

      Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gesto Beiroa, José Manuel (2006-07)
      Article
      Accés obert
      We aim here at analyzing self-adjoint boundary value problems on finite networks associated with positive semi-definite Schrödinger operators. In addition, we study the existence and uniqueness of solutions and its ...
    • Problema 168 

      Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (Real Sociedad Matemática Española, 2010)
      Article
      Accés obert
    • Problemas de contorno discretos 

      Encinas Bachiller, Andrés Marcos (Universitat Politècnica de Catalunya, 2001-10-01)
      Tesi
      Accés obert
      En este trabajo se ha desarrollado un cálculo vectorial sobre estructuras discretas, análogo al de los modelos continuos. Para ello se ha considerado como espacio subyacente un multigrafo finito o variedad discreta y se ...
    • Random walks associated with symmetric M-matrices 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José; Martin Llopis, Álvar (Elsevier, 2023-10)
      Article
      Accés obert
      In this paper we generalize the transition probability matrix for a random walk on a finite network by defining the transition probabilities througha symmetric M-matrix. Usually, the walker jumps from a vertex to a ...
    • Recovering piecewise constant conductances on networks with boundary 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José; Samperio Valdivieso, Álvaro (2023)
      Text en actes de congrés
      Accés obert
      The problem of recovering the conductances of a well-connected spider net-work with boundary from its Dirichlet-to-Robin map is ill-posed for large networks, so despite there is an exact algorithm to solve it [1], the ...
    • Recovering the conductances on grids 

      Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2014)
      Article
      Accés restringit per política de l'editorial
      In this work, we present an algorithm to the recovery of the conductance of a 2– dimensional grid. The algorithm is based in the solution of some overdetermined partial boundary value problems defined on the grid.
    • Recovering the conductances on grids: A theoretical justification 

      Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (2016)
      Article
      Accés obert
      In this work, we present an overview of the work developed by the authors in the context of inverse problems on nite networks. This study performs an extension of the pioneer studies by E.B. Curtis and J.A. Morrow, ...
    • Redes estrella con la M-propiedad 

      Encinas Bachiller, Andrés Marcos (Editorial Universidad de Almería, 2015)
      Text en actes de congrés
      Accés obert
      En este trabajo hacemos una aportación al problema inverso de M –matrices irreducibles, simétricas y singulares, que consiste en determinar c uándo su inversa de grupo es también una M –matriz. Mostramos primero que las ...
    • Regular boundary value problems on a path throughout Chebyshev Polynomials 

      Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gesto Beiroa, José Manuel (2006-08)
      Article
      Accés obert
      In this work we study the different types of regular boundary value problems on a path associated with the Schrödinger operator. In particular, we obtain the Green function for each problem and we emphasize the case of ...
    • Resistance distances in extended or contracted networks 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (Elsevier, 2019-09-01)
      Article
      Accés obert
      In this paper we introduce new effective resistances on a given network, associated with a positive value and two weights on the vertex set and investigate under which conditions they determine a distance. We prove that ...
    • Resistance distances on networks 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (2017)
      Article
      Accés obert
      This paper aims to study a family of distances in networks associated witheffective resistances. Speci cally, we consider the e ective resistance distance with respect to a positive parameter and a weight on the vertex ...
    • Resistive distances on networks 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (2016)
      Text en actes de congrés
      Accés obert
    • Schrödinger random walks and mean first passage time generalization 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José; Martin Llopis, Álvar (2022)
      Text en actes de congrés
      Accés obert
      For spreading and diffusion processes, Random Walks (RW) represents a mathe- matical model and can be used to extract information about important issues in networks. In the study of networks, one often seeks to rank nodes, ...
    • Second order linear difference equations 

      Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José (2017-12-04)
      Article
      Accés obert
      We provide the explicit solution of a general second order linear difference equation via the computation of its associated Green function. This Green function is completely characterized and we obtain a closed expression ...
    • Tema 1 - Álgebra lineal 1_1 

      Ikhouane, Fayçal; Mitjana Riera, Margarida; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2020-03-01)
      Audiovisual
      Accés obert
      Vídeos docents de l'assignatura Àlgebra i càlcul multivariable (Q2) a l'Escola d'Enginyeria Barcelona Est
    • Tema 1 - Álgebra lineal 1_10 

      Ikhouane, Fayçal; Mitjana Riera, Margarida; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2020-03-01)
      Audiovisual
      Accés obert
      Vídeos docents de l'assignatura Àlgebra i càlcul multivariable (Q2) a l'Escola d'Enginyeria Barcelona Est
    • Tema 1 - Álgebra lineal 1_11 

      Ikhouane, Fayçal; Mitjana Riera, Margarida; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2020-03-01)
      Audiovisual
      Accés obert
      Vídeos docents de l'assignatura Àlgebra i càlcul multivariable (Q2) a l'Escola d'Enginyeria Barcelona Est