摘要
Ⅰ. INTRODUCTIONBy high-order (discretization) schemes we can obtain highly accurate numerical solutions of diferential equations by using very few grid points. But the algebraic systems induced by high-order schemes olden are ill-posed and have many non-zero elements. In order to solve these algebraic systems efficiently, Y. S. Wong presented a preconditioned conju-
基金
Project supported by the National Natural Science Foundation of China.
