Ara es mostren els items 10-29 de 251

    • Boundary value problems for Schrödinger operators on a path 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gago Álvarez, Silvia (2012-05-25)
      Report de recerca
      Accés obert
      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)
      Capítol de llibre
      Accés restringit per política de l'editorial
      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
      Accés obert
      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 ...
    • Càlcul : problemes i solucions 

      Estela Carbonell, M. Rosa; Cuello Nebot, Eva; Carmona Mejías, Ángeles (Edicions UPC, 2008)
      Llibre
      Accés obert
      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 ...
    • Cálculo : problemas y soluciones 

      Estela Carbonell, M. Rosa; Cuello Nebot, Eva; Carmona Mejías, Ángeles (Edicions UPC, 2000)
      Llibre
      Accés obert
      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, 2002)
      Llibre
      Accés obert
      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, ...
    • 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
      Accés obert
      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
      Accés obert
      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)
      Text en actes de congrés
      Accés obert
    • Curs 0: preparació per als estudis a l’EEBE 

      Tornil Sin, Sebastián; Botey Cumella, Muriel; Alarcón Jordán, Marta; Alcaraz Sendra, Olga; Ametller Congost, Lluís; Bruna Escuer, Pere; Camps Anaya, Germinal; Carmona Mejías, Ángeles; Claverol Aguas, Mercè; Crespo Artiaga, Daniel; Pablo Ribas, Joan de; Barrio Casado, María del; Valle Mendoza, Luis Javier del; Encinas Bachiller, Andrés Marcos; Farran Marsà, Adriana; Florido Pérez, Antonio; Gámez López, Antonio; García Senz, Domingo; Gibert Agulló, Oriol; Ikhouane, Fayçal; Jiménez Jiménez, María José; José Pont, Jordi; Linares Alegret, Manuel; Lloveras Muntané, Pol Marcel; López López, José; Macovez, Roberto; Mas Blesa, Albert; Mitjana Riera, Margarida; Muñoz Romero, José; Pardo Soto, Luis Carlos; Periago Oliver, M. Cristina; Pineda Soler, Eloi; Pradell Cara, Trinitat; Ruiz Ordóñez, Magda; Sala Cladellas, Glòria; Soler Turu, Lluís; Tamarit Mur, José Luis; Vendrell Villafruela, Xavier; Zanuy Gomara, David (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2022-05)
      Article
      Accés obert
      Aquest article presenta el desenvolupament i primers resultats d'ús d'un conjunt de cursos virtuals que pretenen proporcionar uns coneixements inicials bàsics de Matemàtiques, Física i !ímica als estudiants que accedeixen ...
    • Desde un biberón hasta una catedral 

      Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2010)
      Comunicació de congrés
      Accés obert
    • Dirichlet-to-Robin maps on finite networks 

      Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2015-04-01)
      Article
      Accés obert
      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
      Accés obert
      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 ...
    • Discrete inverse problem on grids 

      Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2016)
      Text en actes de congrés
      Accés obert
      In this work, we present an algorithm to the recovery of the conductance of a n –dimensional grid. The algorithm is based in the solution of some overdetermined partial boundary value problems defined on the grid; that is, ...
    • Discrete Serrin's problem 

      Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (Elsevier, 2015-03-01)
      Article
      Accés obert
      We consider here the discrete analogue of Serrin's problem: if the equilibrium measure of a network with boundary satisfies that its normal derivative is constant, what can be said about the structure of the network and ...
    • Discrete trace function and Poincaré inequality for the study of some linear systems 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (2019)
      Text en actes de congrés
      Accés obert
    • Effective resistances and Kirchhoff index in subdivision networks 

      Carmona Mejías, Ángeles; Mitjana Riera, Margarida; Monsó Burgués, Enrique P.J. (Taylor & Francis, 2016-11-12)
      Article
      Accés obert
      We define a subdivision network ¿S of a given network ¿; by inserting a new vertex in every edge, so that each edge is replaced by two new edges with conductances that fulfill electrical conditions on the new network. In ...
    • Effective resistances and Kirchhoff index in subdivision networks 

      Carmona Mejías, Ángeles; Monsó Burgués, Enrique P.J.; Mitjana Riera, Margarida (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this work we compute the effective resistances and the Kirchhoff Index of subdivision networks in terms of the corresponding parameters of the original network. Our techniques are based on the study of discrete operators ...
    • Eigenvalues with respect to a weight for discrete elliptic boundary value problems 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (2019)
      Text en actes de congrés
      Accés obert
    • Eigenvalues with respect to a weight for general boundary value problems on networks 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (Elsevier, 2021-04-01)
      Article
      Accés obert
      In this work we analyze self-adjoint boundary value problems on networks for Schrödinger operators, in which a part of the boundary with a Neumann condition is always considered. We first characterize when the energy is ...