Exploració per altres contribucions "Universitat Politècnica de Catalunya. MAPTHE - Anàlisi matricial i Teoria Discreta del Potencial"
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A combinatorial expression for the group inverse of symmetric M-matrices
(De Gruytr, 2021-04-27)
Article
Accés obertBy using combinatorial techniques, we obtain an extension of the matrix-tree theorem for general symmetric M-matrices with no restrictions, this means that we do not have to assume the diagonally domi nance hypothesis. We ... -
Apuntes ACM 2018- Integración de línea y superfície
(2018-05)
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Apuntes ACM 2018-Extremos de funciones de varias variables
(2018-04)
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Apuntes ACM 2018-Integración Múltiple de Riemann
(2018-04)
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Apuntes ACM 2019- Álgebra lineal y geometría
(2019-02)
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Apuntes ACM-Álgebra lineal y geometría
(2018-02)
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Apuntes ACM2018 - Funciones de varias variables
(2018-03)
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Boundary value problems for second order linear difference equations: application to the computation of the inverse of generalized Jacobi matrices
(Springer, 2019-07-22)
Article
Accés obertWe 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 ... -
Computing the Green function for a Dirichlet problem on spider networks
(2018)
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Discrete trace function and Poincaré inequality for the study of some linear systems
(2019)
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Drazin inverse of singular adjacency matrices of directed weighted cycles
(2020-09-25)
Article
Accés obertWe present a necessary and sufficient condition for the singularity of circulant matrices associated with directed weighted cycles. This condition is simple and independent of the order of matrices from a complexity point ... -
Eigenvalues with respect to a weight for discrete elliptic boundary value problems
(2019)
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Eigenvalues with respect to a weight for general boundary value problems on networks
(Elsevier, 2021-04-01)
Article
Accés obertIn 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 ... -
Explicit inverse of nonsingular Jacobi matrices
(2019-06-30)
Article
Accés obertWe present here the necessary and sufficient conditions for the invertibility of tridiagonal matrices, commonly named Jacobi matrices, and explicitly compute their inverse. The techniques we use are related with the solution ... -
Generalizing the bottleneck matrix
(2019)
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Accés obertGiven the Laplacian matrix associated to a weighted graph and given x a single vertex of it, the bottleneck matrix (related to x) is the inverse matrix of the sub matrix of the Laplacian obtained by eliminating the row ... -
Green functions for boundary value problems on product networks
(2019)
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Green functions on product networks
(2018-01-01)
Article
Accés obertWe aim here at determining the Green function for general Schrödinger operators on product networks. The first step consists in expressing Schrödinger operators on a product network as sum of appropriate Schrödinger operators ... -
Green's function in partial subdivision networks
(Taylor & Francis, 2018-07-24)
Article
Accés obertIn the present work, we define a partial subdivision network of a given network G, by inserting a new vertex in some selected edges of G, so that each of these edges is replaced by two new edges with conductances that ... -
Green’s kernel of Schrödinger operators on generalized subdivision networks
(2017)
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Group inverse matrix of the normalized Laplacian on subdivision networks
(Universidad de Cádiz, 2017)
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