Table 3.

Error approximation.

(x,t)	Exact	$\omega$	$\mid$ Exact$-\omega \mid$	(x,t)	Exact	$\omega$	$\mid$ Exact$-\omega \mid$
(− 2,0.2)	0.1111	0.1111	2.3867 $\times {10}^{-05}$	(− 1,0.2)	0.1738	0.1738	3.7930 $\times {10}^{-05}$
(0,0.2)	0.1952	0.1953	4.3371 $\times {10}^{-05}$	(1,0.2)	0.1699	0.1700	3.7626 $\times {10}^{-05}$
(2,0.2)	0.1043	0.1043	2.3309 $\times {10}^{-05}$	(− 2,0.4)	0.1144	0.1145	9.6402 $\times {10}^{-05}$
(− 1,0.4)	0.1756	0.1758	1.5231 $\times {10}^{-04}$	(0,0.4)	0.1951	0.1953	1.7346 $\times {10}^{-04}$
(1,0.4)	0.1679	0.1680	1.4988 $\times {10}^{-04}$	(2,0.4)	0.1008	0.1009	9.2654 $\times {10}^{-05}$