Exploració per tema "Circulant matrix"

Ara es mostren els items 1-6 de 6

    • Drazin inverse of singular adjacency matrices of directed weighted cycles 

      Encinas Bachiller, Andrés Marcos (2020-09-25)
      Article
      Accés obert
      We 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 ...

    • Integral formulation of the measured equation of invariance: a novel sparse matrix boundary element method 

      Rius Casals, Juan Manuel; Pous Andrés, Rafael; Cardama Aznar, Ángel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-05-01)
      Article
      Accés obert
      A novel integral formulation of the measured equation of invariance method is derived from the reciprocity theorem and implemented for perfectly conducting (PEC) 2-D scattering problems. This formulation uses the electric ...

    • The group inverse of circulant matrices depending on four parameters 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José; Mitjana Riera, Margarida (De Gruytr, 2021-10-27)
      Article
      Accés obert
      Explicit expressions for the coefficients of the group inverse of a circulant matrix depending on four complex parameters are analytically derived. The computation of the entries of the group inverse are now reduced to the ...

    • The group inverse of circulant matrices with few parameters 

      Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José; Mitjana Riera, Margarida (2021)
      Comunicació de congrés
      Accés obert
      The need of solving linear systems with circulant matrices occursin many problems related to the periodicity of that problem. This class ofsystem appears in many applications that range from numerical solution ofpartial ...

    • The group inverse of circulant matrices with few parameters 

      Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José; Mitjana Riera, Margarida (2021)
      Text en actes de congrés
      Accés obert
      The need of solving linear systems with circulant matrices occurs in many problems related to the periodicity of that problem. This class of system appears in many applications that range from numerical solution of partial ...

    • The group inverse of some circulant matrices 

      Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Jiménez Jiménez, María José; Mitjana Riera, Margarida (Elsevier, 2020-11-12)
      Article
      Accés obert
      In a previous work the authors presented the necessary and sufficient conditions for the invertibility of some circulant matrices that depend on three real parameters and, moreover, we obtained a closed formula for their ...