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

Table 5

Maximum absolute error of Example 3 before Richardson extrapolation for .

	8	16	32	64	128	256
	1.1318e − 03	2.7968e − 04	6.9551e − 05	1.7366e − 05	4.3405e − 06	1.0850e − 06
	1.4786e − 02	3.6872e − 03	8.5968e − 04	2.1118e − 04	5.2578e − 05	1.3152e − 05
	4.7613e − 02	2.9531e − 02	1.4879e − 02	5.5516e − 03	1.4704e − 03	3.3684e − 04
	4.8375e − 02	3.0553e − 02	1.7528e − 02	9.4597e − 03	4.9243e − 03	2.4698e − 03
	4.8423e − 02	3.0586e − 02	1.7549e − 02	9.4718e − 03	4.9323e − 03	2.5185e − 03
	4.8426e − 02	3.0589e − 02	1.7550e − 02	9.4725e − 03	4.9327e − 03	2.5187e − 03
	4.8426e − 02	3.0589e − 02	1.7550e − 02	9.4725e − 03	4.9328e − 03	2.5187e − 03
	4.8426e − 02	3.0589e − 02	1.7550e − 02	9.4725e − 03	4.9328e − 03	2.5187e − 03
	4.8426e − 02	3.0589e − 02	1.7550e − 02	9.4725e − 03	4.9328e − 03	2.5187e − 03
	4.8426e − 02	3.0589e − 02	1.7550e − 02	9.4725e − 03	4.9328e − 03	2.5187e − 03
	4.8426e − 02	3.0589e − 02	1.7550e − 02	9.4725e − 03	4.9328e − 03	2.5187e − 03
	4.8426e − 02	3.0589e − 02	1.7550e − 02	9.4725e − 03	4.9328e − 03	2.5187e − 03
	0.6628	0.8015	0.8897	0.9413	0.9697	–