Table 3.

Comparison of the absolute error at some selected points ($M=5,{\lambda }_1=1,{\lambda }_2=3,{\lambda }_3=4,{\lambda }_4=3$).

(x, t)	$\omega =0.5$		$\omega =0.7$		$\omega =0.99$
	AB	CF	AB	CF	AB	CF
(0.1,0.1)	$2.488e-2$	$2.203e-2$	$2.165e-2$	$1.823e-2$	$1.253e-3$	$5.482e-4$
(0.3,0.3)	$1.729e-2$	$8.122e-3$	$1.119e-2$	$1.119e-3$	$1.064e-3$	$1.610e-3$
(0.5,0.5)	$2.379e-3$	$1.197e-2$	$6.092e-3$	$1.486e-2$	$1.106e-3$	$8.904e-4$
(0.7,0.7)	$8.982e-3$	$1.514e-2$	$9.800e-3$	$1.391e-3$	$8.813e-4$	$6.349e-4$
(0.9,0.9)	$4.675e-3$	$6.516e-3$	$4.367e-3$	$4.932e-3$	$4.051e-7$	$1.552e-4$