Now showing items 1-20 of 70

  • 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 ...
  • Boundary value problems for second order linear difference equations: application to the computation of the inverse of generalized Jacobi matrices 

    Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José (Springer, 2019-07-22)
    Article
    Open Access
    We have named generalized Jacobi matrices to those that are practically tridiagonal, except for the two final entries and the two first entries of its first andits last row respectively. This class of matrices encompasses ...
  • Bounded solutions of second order lineal difference equations with periodic coefficients 

    Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José (2016)
    Conference report
    Open Access
  • Bounded solutions of self-adjoint second order linear difference equations with periodic coefficients 

    Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José (2018-02-25)
    Article
    Open Access
    In this work we obtain easy characterizations for the boundedness of the solutions of the discrete, self–adjoint, second order and linear unidimensional equations with periodic coefficients, including the analysis of the ...
  • 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 de la inversa de una matriz de Jacobi 

    Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José (Universidad de Cádiz, 2017)
    Conference report
    Restricted access - publisher's policy
    En este trabajo aportamos las condiciones necesarias y suficientes para la invertibilidad de las matrices de Jacobi y calculamos explícitamente su inversa. Las técnicas que utilizamos están relacionadas con la soluciones ...
  • 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 ...
  • Combinatorial recurrences and linear difference equations 

    Jiménez Jiménez, María José; Encinas Bachiller, Andrés Marcos (2016)
    Conference report
    Restricted access - publisher's policy
    In this work we introduce the triangular arrays of depth greater than 1 given by linear recurrences, that generalize some well-known recurrences that appear in enumerative combinatorics. In particular, we focussed on ...
  • Combinatorial recurrences and linear difference equations 

    Jiménez Jiménez, María José; Encinas Bachiller, Andrés Marcos (2016-10-17)
    Article
    Open Access
    In this work we introduce the triangular arrays of depth greater than 1 given by linear recurrences, that generalize some well known recurrences that appear in enumerative combinatorics. In particular, we focussed on ...
  • 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 ...
  • Desde un biberón hasta una catedral 

    Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2010)
    Conference lecture
    Open Access