牛顿迭代法（Newton's method）又称为牛顿-拉夫逊（拉弗森）方法（Newton-Raphson method），它是牛顿在17世纪提出的一种在实数域和复数域上近似求解方程的方法(In numerical analysis Newton's method also known as the Newton Raphson method named after Isaac Newton and Joseph Raphson is a method for finding successively better approximations to the roots　or zeroes of a real-valued function It is one example of a root finding algorithm)