根中的多元次结式
Multivariate Subresultants in Roots
摘要:
本文给出了n+1个一般多项式f_1,.,f_2,.,f_3的子结式的有理表达式,n个变量的f_{n+1},作为f_1,.,的公共根坐标的函数f_n及其在f_{n+1}中的计算。我们给出了一个简单的证明方法,给出了新的证明,推广了经典的投影结式的Poisson积公式,以及Hong关于根中一元子结式的表达式.
英文摘要:
We give rational expressions for the subresultants of n+1 generic polynomials f_1,..., f_{n+1} in n variables as a function of the coordinates of the common roots of f_1,..., f_n and their evaluation in f_{n+1}. We present a simple technique to prove our results, giving new proofs and generalizing the classical Poisson product formula for the projective resultant, as well as the expressions of Hong for univariate subresultants in roots.
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