• Tridiagonal M-matrices whose inverse is tridiagonal and related pentadiagonal matrices 

      Barreras, Álvaro (1); Peña, Juan Manuel (Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales - Serie A: Matematicas, 01/10/2019)
      A necessary and sufficient condition in order to guarantee that the inverse of a tridiagonal M-matrix is tridiagonal is provided. Pentadiagonal M-matrices whose inverse is pentadiagonal are also analyzed.