Publications of the Scuola Normale Superiore

Boito, Paola

Defining and computing a greatest common divisor of two polynomials with inexact coefficients is a classical problem in symbolic-numeric computation. The first part of this book reviews the main results that have been proposed so far in the literature. As usual with polynomial computations, the polynomial GCD problem can be expressed in matrix form: the second part of the book focuses on this point of view and analyses the structure of the relevant matrices, such as Toeplitz, Toepliz-block and displacement structures. New algorithms for the computation of approximate polynomial GCD are presented, along with extensive numerical tests. The use of matrix structure allows, in particular, to lower the asymptotic computational cost from cubic to quadratic order with respect to polynomial degree.

Details

Published by: Edizioni della Normale

Publication Date: 2011-07-12

Format: Paperback

ISBN-13: 9788876423802

DOI: 10.1007/978-88-7642-381-9

Dimensions: 240cm x168cm

Pages: 250