Algorithm 681: INTBIS, a portable interval Newton/bisection package

  • Authors:
  • R. Baker Kearfott;Manuel Novoa, III

  • Affiliations:
  • Univ. of Southwestern Louisiana, Lafayette;Univ. of Southwestern Louisiana, Lafayette

  • Venue:
  • ACM Transactions on Mathematical Software (TOMS)
  • Year:
  • 1990

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Abstract

We present a portable software package for finding all real roots of a system of nonlinear equations within a region defined by bounds on the variables. Where practical, the package should find all roots with mathematical certainty. Though based on interval Newton methods, it is self-contained. It allows various control and output options and does not require programming if the equations are polynomials; it is structured for further algorithmic research. Its practicality does not depend in a simple way on the dimension of the system or on the degree of nonlinearity.