A new algorithm for computing certified numerical approximations of the roots of a zero-dimensional system

  • Authors:
  • Stef Graillat;Philippe Trébuchet

  • Affiliations:
  • UPMC/CNRS LIP6, Paris, France;UPMC/CNRS LIP6, Paris, France

  • Venue:
  • Proceedings of the 2009 international symposium on Symbolic and algebraic computation
  • Year:
  • 2009

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Abstract

This paper provides a new method for computing numerical approximations of the roots of a zero-dimensional system. It works on general systems, even those with multiple roots, and avoids any arbitrary choice of linear combination of the multiplication operators. It works by computing eigenvectors (or a basis of the full invariant subspaces). The sparsity/structure of the multiplication operators by one variable can also be taken into account.