【摘要】 给出了变系数Helmholtz方程的六阶高精度校正法.此校正过程几乎不增加工作量,而校正后精度比未校正提高了四阶,并能提供后验误差估计.同时,对于常系数Helmholtz方程,给出了八阶校正格式.更多还原

【Abstract】 A sixth order correction method for eigenvalue problems of Hlemholtz equations with variable coefficients is introduced. The correction procedure only needs little compute, but the precision is much higher than uncorrection and a posteriori error can be obtained by this method. Particularly an eighth order correction method for eigenvalue problems of Helmholtz equations with constant coefficients is introduced.更多还原