The characteristic of this algorithm is described by finite difference analysis. A set of formulas on linear high order Lagrange interpolation and Hermite interpolation is shown, then iterative step reduced calculating is proposed.

• 通过有限差分分析说明了算法的特性,并基于线性、高阶拉格朗日插值、埃米特插值给出了一族算法公式。 接着又给出了减小计算量的迭代步骤。