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Theory and Modern Applications

Table 3 \(\pmb{H_{1}}\) -errors and computational orders obtained for Example  2 with \(\pmb{N=24}\)

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

τ

α  = 0.2

α  = 0.4

α  = 0.6

α  = 0.8

Error

Order

Error

Order

Error

Order

Error

Order

1/10

8.9564e–3

/.

4.4841e–2

/.

5.2904e–3

/.

3.0702e–2

/.

1/20

3.0839e–3

1.5382

1.9459e–2

1.2044

1.4940e–3

1.8242

1.1640e–2

1.3992

1/40

1.0420e–3

1.5653

8.3812e–3

1.2152

4.2433e–4

1.8159

4.4051e–3

1.4018

1/80

3.4795e–4

1.5824

3.6017e–3

1.2185

1.2097e–4

1.8106

1.6669e–3

1.4020

1/160

1.1530e–4

1.5935

1.5483e–3

1.2180

3.4569e–5

1.8071

6.3092e–4

1.4016

1/320

3.8019e–5

1.6006

6.6648e–4

1.2160

9.8950e–6

1.8047

2.3889e–4

1.4011

1/640

1.2496e–5

1.6052

2.8740e–4

1.2135

2.8354e–6

1.8031

9.0477e–5

1.4007