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Numerical and geometric properties of a method for finding points on real solution components

Published: 28 July 2014 Publication History

Abstract

We consider a critical point method developed in our earlier work for finding certain solution (witness) points on real solution components of real polynomial systems of equations. The method finds points that are critical points of the distance from a plane to the component with the requirement that certain regularity conditions are satisfied. In this paper we analyze the numerical stability of the method. We aim to find at least one well conditioned witness point on each connected component by using perturbation, path tracking and projection techniques. An optimal-direction strategy and an adaptive step size control strategy for path following on high dimensional components are given.

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      cover image ACM Other conferences
      SNC '14: Proceedings of the 2014 Symposium on Symbolic-Numeric Computation
      July 2014
      154 pages
      ISBN:9781450329637
      DOI:10.1145/2631948
      Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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      • 973 Program: National Basic Research Program of China
      • KLMM: Key Laboratory of Mathematics Mechanization
      • MapleSoft
      • ORCCA: Ontario Research Centre for Computer Algebra
      • NSFC: Natural Science Foundation of China
      • Chinese Academy of Engineering: Chinese Academy of Engineering
      • NAG: Numerical Algorithms Group

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      New York, NY, United States

      Publication History

      Published: 28 July 2014

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      Author Tags

      1. numerical algebraic geometry
      2. path tracking
      3. perturbation
      4. real witness points
      5. root isolation
      6. singular value

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      SNC '14
      Sponsor:
      • 973 Program
      • KLMM
      • ORCCA
      • NSFC
      • Chinese Academy of Engineering
      • NAG
      SNC '14: Symbolic-Numeric Computation 2014
      July 28 - 31, 2014
      Shanghai, China

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