Approximate square-free decomposition and root-finding of lll-conditioned algebraic equations
Journal of Information Processing
Journal of Information Processing
Detection and validation of clusters of polynomial zeros
Journal of Symbolic Computation - Special issue: validated numerical methods and computer algebra
Polynomial remainder sequence and approximate GCD
ACM SIGSAM Bulletin
Subresultants and Reduced Polynomial Remainder Sequences
Journal of the ACM (JACM)
On Euclid's Algorithm and the Theory of Subresultants
Journal of the ACM (JACM)
Hauptvortrag: Quantifier elimination for real closed fields by cylindrical algebraic decomposition
Proceedings of the 2nd GI Conference on Automata Theory and Formal Languages
Nearest multivariate system with given root multiplicities
Journal of Symbolic Computation
Hi-index | 0.00 |
This paper investigates the subresultant of univariate polynomials from the viewpoint of close roots. First, we derive formulas which express the subresultant and its cofactors in the root-differences. Then, we consider the case that the given polynomials contain one or more clusters of mutually close roots of closeness ß. We derive formulas showing the dependences of the coefficients of subresultant and its cofactors on ß and the number of clusters. Finally, we determine the magnitudes of cancellations which occur when we apply the Euclidean algorithm to polynomials having close roots.