New progress in univariate polynomial root finding
New progress in univariate polynomial root finding
复制标题
单变量多项式求根新进展
DOI:
10.1145/3373207.3404063
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Pan, Victor Y.
中科院分区:
文献类型:
--
作者:
Imbach, Rémi;Pan, Victor Y.
The recent advanced sub-division algorithm is nearly optimal for the approximation of the roots of a dense polynomial given in monomial basis; moreover, it works locally and slightly outperforms the user's choice MPSolve when the initial region of interest contains a small number of roots. Its basic and bottleneck block is counting the roots in a given disc on the complex plain based on Pellet's theorem, which requires the coefficients of the polynomial and expensive shift of the variable. We implement a novel method for both root-counting and exclusion test, which is faster, avoids the above requirements, and remains efficient for sparse input polynomials. It relies on approximation of the power sums of the roots lying in the disc rather than on Pellet's theorem. Such approximation was used by Schönhage in 1982 for the different task of deflation of a factor of a polynomial provided that the boundary circle of the disc is sufficiently well isolated from the roots. We implement a faster version of root-counting and exclusion test where we do not verify isolation and significantly improve performance of subdivision algorithms, particularly strongly in the case of sparse inputs. We present our implementation as heuristic and cite some relevant results on its formal support presented elsewhere.
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影响因子:
3.9
作者:
Ponrasu, Thangavel;Veerasubramanian, Praveen Krishna;Kannan, Ramya;Gopika, Selvakumar;Suguna, Lonchin;Muthuvijayan, Vignesh
通讯作者:
Muthuvijayan, Vignesh
DOI:
10.1145/3326229.3326270
发表时间:
2019
期刊:
Proceedings of the 2019 on International Symposium on Symbolic and Algebraic Computation
影响因子:
--
作者:
Juan Xu;C. Yap
通讯作者:
C. Yap
DOI:
10.1007/978-3-319-96418-8_28
发表时间:
2018
期刊:
International Congress on Mathematical Software (ICMS
影响因子:
--
作者:
Imbach, Rémi;Pan, Victor;Yap, Chee
通讯作者:
Yap, Chee
DOI:
10.1007/978-3-030-26831-2_26
发表时间:
2019
期刊:
21st International Workshop on Computer Algebra in Scientific Computing (CASC'2019
影响因子:
--
作者:
Pan, Victor
通讯作者:
Pan, Victor
DOI:
10.1006/jcom.1999.0532
发表时间:
2000
期刊:
J. Complex.
影响因子:
--
作者:
V. Pan
通讯作者:
V. Pan