Higher-Order Uniformly Convergent Numerical Scheme for Singularly Perturbed Differential Difference Equations with Mixed Small Shifts

Table 3

Maximum absolute error of Example 2 before Richardson extrapolation for .

	8	16	32	64	128	256
	3.4492e − 03	1.6925e − 03	8.3747e − 04	4.1601e − 04	2.0724e − 04	1.0343e − 04
	2.2763e − 02	7.6376e − 03	1.4739e − 03	1.5941e − 03	7.8163e − 04	3.8784e − 04
	2.3670e − 02	1.1054e − 02	5.2737e − 03	2.5716e − 03	1.2314e − 03	4.9403e − 04
	2.3670e − 02	1.1054e − 02	5.2735e − 03	2.5654e − 03	1.2638e − 03	6.2704e − 04
	2.3670e − 02	1.1054e − 02	5.2735e − 03	2.5654e − 03	1.2638e − 03	6.2704e − 04
	2.3670e − 02	1.1054e − 02	5.2735e − 03	2.5654e − 03	1.2638e − 03	6.2704e − 04
	2.3670e − 02	1.1054e − 02	5.2735e − 03	2.5654e − 03	1.2638e − 03	6.2704e − 04
	2.3670e − 02	1.1054e − 02	5.2735e − 03	2.5654e − 03	1.2638e − 03	6.2704e − 04
	2.3670e − 02	1.1054e − 02	5.2735e − 03	2.5654e − 03	1.2638e − 03	6.2704e − 04
	2.3670e − 02	1.1054e − 02	5.2735e − 03	2.5654e − 03	1.2638e − 03	6.2704e − 04
	2.3670e − 02	1.1054e − 02	5.2735e − 03	2.5654e − 03	1.2638e − 03	6.2704e − 04
	2.3670e − 02	1.1054e − 02	5.2735e − 03	2.5654e − 03	1.2638e − 03	6.2704e − 04
	1.0985	1.0677	1.0396	1.0214	1.0111	–