Sturm Sequences and Modified Subresultant Polynomial Remainder Sequences

Akritas, Alkiviadis, Malaschonok, Gennadi, and Vigklas, Panagiotis. "Sturm Sequences and Modified Subresultant Polynomial Remainder Sequences." Serdica Journal of Computing 8.1 (2014): 29-46. <http://eudml.org/doc/268663>.

@article{Akritas2014,
abstract = {ACM Computing Classification System (1998): F.2.1, G.1.5, I.1.2.In 1971 using pseudo-divisions - that is, by working in Z[x] - Brown and Traub computed Euclid’s polynomial remainder sequences (prs’s) and (proper) subresultant prs’s using sylvester1, the most widely known form of Sylvester’s matrix, whose determinant defines the resultant of two polynomials. In this paper we use, for the first time in the literature, the Pell-Gordon Theorem of 1917, and sylvester2, a little known form of Sylvester’s matrix of 1853 to initially compute Sturm sequences in Z[x] without pseudodivisions - that is, by working in Q[x]. We then extend our work in Q[x] and, despite the fact that the absolute value of the determinant of sylvester2 equals the absolute value of the resultant, we construct modified subresultant prs’s, which may differ from the proper ones only in sign.This author is partly supported by project 2476 of the Government Task of the Russian Ministry of Education and Science (No. 2014/285) and by project 12-07-00755 of Russian Foundation for Basic Research.},
author = {Akritas, Alkiviadis, Malaschonok, Gennadi, Vigklas, Panagiotis},
journal = {Serdica Journal of Computing},
keywords = {Polynomials; Real Roots; Sturm Sequences; Sylvester’s Matrices; Matrix Triangularization},
language = {eng},
number = {1},
pages = {29-46},
publisher = {Institute of Mathematics and Informatics Bulgarian Academy of Sciences},
title = {Sturm Sequences and Modified Subresultant Polynomial Remainder Sequences},
url = {http://eudml.org/doc/268663},
volume = {8},
year = {2014},
}

TY - JOUR
AU - Akritas, Alkiviadis
AU - Malaschonok, Gennadi
AU - Vigklas, Panagiotis
TI - Sturm Sequences and Modified Subresultant Polynomial Remainder Sequences
JO - Serdica Journal of Computing
PY - 2014
PB - Institute of Mathematics and Informatics Bulgarian Academy of Sciences
VL - 8
IS - 1
SP - 29
EP - 46
AB - ACM Computing Classification System (1998): F.2.1, G.1.5, I.1.2.In 1971 using pseudo-divisions - that is, by working in Z[x] - Brown and Traub computed Euclid’s polynomial remainder sequences (prs’s) and (proper) subresultant prs’s using sylvester1, the most widely known form of Sylvester’s matrix, whose determinant defines the resultant of two polynomials. In this paper we use, for the first time in the literature, the Pell-Gordon Theorem of 1917, and sylvester2, a little known form of Sylvester’s matrix of 1853 to initially compute Sturm sequences in Z[x] without pseudodivisions - that is, by working in Q[x]. We then extend our work in Q[x] and, despite the fact that the absolute value of the determinant of sylvester2 equals the absolute value of the resultant, we construct modified subresultant prs’s, which may differ from the proper ones only in sign.This author is partly supported by project 2476 of the Government Task of the Russian Ministry of Education and Science (No. 2014/285) and by project 12-07-00755 of Russian Foundation for Basic Research.
LA - eng
KW - Polynomials; Real Roots; Sturm Sequences; Sylvester’s Matrices; Matrix Triangularization
UR - http://eudml.org/doc/268663
ER -