x	$Exact = - \frac{3}{2} k^{2} sech {(\frac{1}{2} k (x + \sqrt{- k^{2} + 1} t))}^{2}$	u(x)	Error
0.10000	−1.4962562	−1.4962562	0.0000000
0.20000	−1.4850994	−1.4850994	0.0000000
0.30000	−1.4667499	−1.4667499	0.0000000
0.40000	−1.4415645	−1.4415645	0.0000000
0.50000	−1.4100223	−1.4100223	0.0000000
0.60000	−1.3727054	−1.3727054	0.0000000
0.70000	−1.3302772	−1.3302772	0.0000000
0.80000	−1.2834582	−1.2834582	0.0000000
0.90000	−1.2330018	−1.2330018	0.0000000
1.00000	−1.1796716	−1.1796716	0.0000000