A condition for multiplicity structure of univariate polynomials
A condition for multiplicity structure of univariate polynomials
复制标题
单变量多项式重数结构的一个条件
DOI:
10.1016/j.jsc.2020.08.007
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发表时间:
2020-01
影响因子:
0.7
通讯作者:
Jing Yang
中科院分区:
文献类型:
--
作者:
Hoon Hong;Jing Yang
We consider the problem of finding a condition for a univariate polynomial having a given multiplicity structure when the number of distinct roots is given. It is well known that such conditions can be written as conjunctions of several polynomial equations and one inequation in the coefficients, by using repeated parametric gcd's. In this paper, we give a novel condition which is not based on repeated gcd's. Furthermore, it is shown that the number of polynomials in the condition is optimal and the degree of polynomials is smaller than that in the previous condition based on repeated gcd's.
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