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On higher-order discriminants
Bulletin des Sciences Mathématiques ( IF 1.3 ) Pub Date : 2020-02-19 , DOI: 10.1016/j.bulsci.2020.102842 Vladimir Petrov Kostov
中文翻译:
关于高阶判别
更新日期:2020-02-19
Bulletin des Sciences Mathématiques ( IF 1.3 ) Pub Date : 2020-02-19 , DOI: 10.1016/j.bulsci.2020.102842 Vladimir Petrov Kostov
For the family of polynomials in one variable , , we consider its higher-order discriminant sets , where , , …, , and their projections in the spaces of the variables . Set , . We show that , where , if and , if . The equation defines the projection in the space of the variables of the closure of the set of values of for which P and have two distinct roots in common. The polynomials are irreducible. The result is generalized to the case when is replaced by a polynomial , for .
中文翻译:
关于高阶判别
对于一个变量中的多项式族 , ,我们考虑其高阶判别集 ,在哪里 , ,…, ,以及它们在变量空间中的投影 。组, 。我们证明,在哪里 , 如果 和 , 如果 。等式 定义变量空间中的投影 的一组值的闭合 其中P和有两个不同的共同点。多项式不可约。结果推广到以下情况 被多项式代替 , 对于 。