CHAWLA-NUMEROV METHOD REVISITED

[摘要] The well-known two-step fourth-order Numerov method was shown to have better interval of periodicity when made explicit, see Chawla (1984). It is readily verifiable that the improved method still has phase-lag of order 4. We suggest a slight modification from which linear problems could benefit. Phase-lag of any order can be achieved, but only order 6 is derived.

[发布日期] 1991-08-27

[关键词] CHAWLA-NUMEROV METHOD;HIGHER DERIVATIVES AND PHASE-LAG;PERIODIC 2ND-ORDER INITIAL-VALUE PROBLEMS