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Open Access Publications from the University of California

Convergence of LR algorithm for a one-point spectrum tridiagonal matrix

  • Author(s): Ferreira, Carla
  • Parlett, Beresford
  • et al.

We prove convergence for the basic LR algorithm on a real unreduced tridiagonal matrix with a one-point spectrum—the Jordan form is one big Jordan block. First we develop properties of eigenvector matrices. We also show how to deal with the singular case.

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