Now showing items 1-20 of 65

  • A formula for the Kirchhoff index 

    Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gesto Beiroa, José Manuel (2007-09-30)
    Article
    Open Access
    We show here that the Kirchhoff index of a network is the average of the Wiener capacities of its vertices. Moreover, we obtain a closed-form formula for the effective resistance between any pair of vertices when the ...
  • Application of the forces' method in dynamic systems 

    Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gesto Beiroa, José Manuel (2007-10-11)
    Article
    Open Access
    We present here some applications of the Forces's method in dynamic systems. In particular, we consider the problem of the approximation of the trajectories of a conservative system of point masses by means of the minimization ...
  • Apuntes ACM 2018-Extremos de funciones de varias variables 

    Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2018-04)
    External research report
    Open Access
  • Apuntes ACM2018 - Funciones de varias variables 

    Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2018-03)
    External research report
    Open Access
  • Apuntes ACM 2018- Integración de línea y superfície 

    Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2018-05)
    External research report
    Open Access
  • Apuntes ACM 2018-Integración Múltiple de Riemann 

    Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2018-04)
    External research report
    Open Access
  • Apuntes ACM 2019- Álgebra lineal y geometría 

    Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2019-02)
    External research report
    Open Access
  • Apuntes ACM-Álgebra Lineal y Geometría 

    Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2018-02)
    External research report
    Open Access
  • Boundary value problems for Schrödinger operators on a path 

    Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gago Álvarez, Silvia (2012-05-25)
    External research report
    Open Access
    In this work, we concentrate on determining explicit expressions, via suitable orthogonal polynomials on the line, for the Green function associated with any regular boundary value problem on a weighted path, whose weights ...
  • Boundary value problems for Schrödinger operators on a Path Associated to Orthogonal Polynomials 

    Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gago Álvarez, Silvia (Springer, 2013)
    Part of book or chapter of book
    Restricted access - publisher's policy
    In this work, we concentrate on determining explicit expressions, via suitable orthogonal polynomials on the line, for the Green function associated with any regular boundary value problem on a weighted path, whose weights ...
  • Bounds on the first non-null eigenvalue for self-adjoint boundary value problems on networks 

    Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gesto Beiroa, José Manuel (2006-09)
    Article
    Open Access
    We aim here at obtaining bounds on the first non-null eigenvalue for self-adjoint boundary value problems on a weighted network by means of equilibrium measures, that includes the study of Dirichlet, Neumann and Mixed ...
  • Cálculo : problemas y soluciones 

    Estela Carbonell, M. Rosa; Cuello Nebot, Eva; Carmona Mejías, Ángeles (Edicions UPC, 2002)
    Book
    Open Access
    Los problemas contenidos en el libro que se presenta son el resultado de cuatro años de docencia en la asignatura Cálcul I de la ETSECCPB. En ellos se desarrolla el cálculo diferencial e integral de una y varias variables, ...
  • Cálculo : problemas y soluciones 

    Estela Carbonell, M. Rosa; Cuello Nebot, Eva; Carmona Mejías, Ángeles (Edicions UPC, 2000)
    Book
    Open Access
    Los problemas contenidos en el libro que se presenta son el resultado de cuatro años de docencia en la asignatura Cálcul I de la ETSECCPB. En ellos se desarrolla el cálculo diferencial e integral de una y varias variables, ...
  • Càlcul : problemes i solucions 

    Estela Carbonell, M. Rosa; Cuello Nebot, Eva; Carmona Mejías, Ángeles (Edicions UPC, 2008)
    Book
    Open Access
    Els problemes que aquest llibre conté són el resultat d'alguns anys de docència en l'assignatura Càlcul de les titulacions d'Enginyeria de Camins, Canals i Ports, i d'Enginyeria Geològica, i desenvolupen el càlcul diferencial ...
  • Characterization of symmetric M-matrices as resistive inverses 

    Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gesto Beiroa, José Manuel (2007-01-25)
    Article
    Open Access
    We aim here at characterizing those nonnegative matrices whose inverse is an irreducible Stieltjes matrix. Specifically, we prove that any irreducible Stieltjes matrix is a resistive inverse. To do that we consider the ...
  • Computational cost of the Fekete problem 

    Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gesto Beiroa, José Manuel (2007-10-11)
    Article
    Open Access
    We present here strong numerical and statistical evidence of the fact that the Smale's 7th problem can be answered affirmatively. In particular, we show that a local minimum for the logarithmic potential energy in the ...
  • Computing the Green function for a Dirichlet problem on spider networks 

    Carmona Mejías, Ángeles; Mitjana Riera, Margarida (2018)
    Conference report
    Open Access
  • Desde un biberón hasta una catedral 

    Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2010)
    Conference lecture
    Open Access
  • Dirichlet-to-Robin maps on finite networks 

    Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2015-04-01)
    Article
    Open Access
    Our aim is to characterize those matrices that are the response matrix of a semi positive definite Schrodinger operator on a circular planar network. Our findings generalize the known results and allow us to consider both ...
  • Dirichlet-to-Robin matrix on networks 

    Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2014)
    Article
    Open Access
    In this work, we de ne the Dirichlet{to{Robin matrix associated with a Schr odinger type matrix on general networks, and we prove that it satis es the alternating property which is essential to characterize those matrices ...