差分公式 meaning in English

difference formula

In part one , the 2 - d finite - difference formula are set up
第一部分进行二维有限差分公式的推导。
Based on the fourth - order difference formula of the second derivative term , a fourth - order finite difference method is developed for solving two - points boundary value problem
摘要从中心差分公式出发，利用二阶微分的四阶差分公式，对两点边值问题得到了一种四阶精度的差分格式。