借助显式紧致格式和隐式紧致格式的思想,构造了求解两点边值问题的一种混合型紧致格式.该格式仅用到3个点上的未知函数值及其一阶导数值,而一阶导数值利用四阶Padé格式进行计算.格式整体具有四阶精度,数值实验结果验证了其精确性和可靠性.
Compact scheme is divided into explicit compact scheme and implicit compact scheme.With the help of two kinds of compact scheme ideas,a mixed high-order compact difference scheme is constructed for solving the two-point boundary value problem.The scheme uses three-point unknown function values and theirs first-order derivative values.The first-order derivative is solved by the Padéscheme.The proposed scheme is overall fouth-order accuracy.Numerical experiments are given to prove the efficiency and dependability of the present scheme.