Meneguette Júnior, Messias [UNESP]2014-05-272014-05-271991-08-27Journal of Computational and Applied Mathematics, v. 36, n. 2, p. 247-250, 1991.0377-0427http://hdl.handle.net/11449/64137The 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. © 1991.247-250engChawla-Numerov methodhigher derivatives and phase-lagperiodic second-order initial-value problemsCarta10.1016/0377-0427(91)90030-NAcesso aberto2-s2.0-00012915302-s2.0-0001291530.pdf1531018187057108