A new framework for sharp and efficient resolution of NCSP with manifolds of solutions

  • Authors:
  • Alexandre Goldsztejn;Laurent Granvilliers

  • Affiliations:
  • CNRS, Laboratoire d'Informatique de Nantes Atlantique, Nantes, France;Laboratoire d'Informatique de Nantes Atlantique, University of Nantes, Nantes, France

  • Venue:
  • Constraints
  • Year:
  • 2010

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Abstract

When numerical CSPs are used to solve systems of n equations with n variables, the preconditioned interval Newton operator plays two key roles: First it allows handling the n equations as a global constraint, hence achieving a powerful contraction. Second it can prove rigorously the existence of solutions. However, none of these advantages can be used for under-constrained systems of equations, which have manifolds of solutions. A new framework is proposed in this paper to extend the advantages of the preconditioned interval Newton to under-constrained systems of equations. This is achieved simply by allowing domains of the NCSP to be parallelepipeds, which generalize the boxes usually used as domains.