arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1508.02935math.NAcs.NAmath.DS
收藏

实用的牛顿法:高效求百万次多项式的所有根

Newton's method in practice: finding all roots of polynomials of degree one million efficiently

Dierk Schleicher, Robin Stoll

摘要:

我们用牛顿法找到所有根的几个多项式在一个复变数的程度高达和超过一百万,并表明,该方法,适用于适当选择的起点,可以变成一个算法,可以经常应用于找到所有的根没有紧缩和固有的数值稳定性的牛顿法。我们指定了一个算法,证明终止,并找到所有根的任意次数的任何多项式,提供所有的根是不同的和精确的计算是可用的。众所周知,牛顿法本质上是稳定的,因此计算误差不会累积;我们提供了一个精确的界限,多少数值精度是足够的。

英文摘要:

We use Newton's method to find all roots of several polynomials in one complex variable of degree up to and exceeding one million and show that the method, applied to appropriately chosen starting points, can be turned into an algorithm that can be applied routinely to find all roots without deflation and with the inherent numerical stability of Newton's method. We specify an algorithm that provably terminates and finds all roots of any polynomial of arbitrary degree, provided all roots are distinct and exact computation is available. It is known that Newton's method is inherently stable, so computing errors do not accumulate; we provide an exact bound on how much numerical precision is sufficient.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑