The Use of Phase Lag and Amplification Error Derivatives for the Construction of a Modified Runge-Kutta-Nyström Method

Table 1

Lennard-Jones potential with 𝐸=25.

𝑙(𝐸=25)	Kobeissi et al. [16]	MRKNDPAF4	EFRKN4	DEPRKN4	RKNPAF4
0	−0.48302543	2.35	1.74	1.88	1.74
1	0.92824634	2.33	1.75	1.89	1.75
2	−0.96354014	2.26	1.77	1.91	1.77
3	0.12073704	2.30	1.79	1.93	1.79
4	1.03290370	2.27	1.82	1.97	1.82
5	−1.37840550	2.29	1.85	2.01	1.86
6	−0.84398975	2.45	1.90	2.07	1.91
7	−0.52543971	2.53	1.95	2.13	1.95
8	−0.45743790	2.62	2.00	2.19	2.00
9	−0.75702397	2.70	2.05	2.26	2.03
10	1.41486080	3.02	2.17	2.42	2.16