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Theory and Modern Applications

Table 4 \(\pmb{H_{1}}\) -errors and computational orders obtained for Example  2 with \(\pmb{\tau=\frac{1}{20{,}000}}\)

From: Generalized finite difference/spectral Galerkin approximations for the time-fractional telegraph equation

N

α  = 0.1

α  = 0.2

α  = 0.6

α  = 0.7

Error

Order

Error

Order

Error

Order

Error

Order

2

2.2177e–1

/.

2.0246e–1

/.

1.2001e–1

/.

9.9513e–2

/.

4

2.4817e–2

3.1597

2.4122e–2

3.0692

2.0552e–2

2.5458

1.9405e–2

2.3584

6

1.5946e–3

6.7698

1.5740e–3

6.7317

1.4611e–3

6.5204

1.4240e–3

6.4422

8

7.8627e–5

10.4618

7.8082e–5

10.4408

7.5048e–5

10.3197

7.4070e–5

10.2759

10

3.2262e–6

14.3111

3.2127e–6

14.2987

3.1351e–6

14.2306

3.1112e–6

14.2062

12

1.1496e–7

18.2889

1.2356e–7

17.8703

1.1173e–7

18.2881

1.2943e–7

17.4396