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Table 1 Numerical results for Example 1 (\(\theta =0.5\), \(\sigma=1\), \(\lambda=5\), \(\alpha=0.5\))

From: A fast multiscale Galerkin algorithm for solving boundary value problem of the fractional Bagley–Torvik equation

n

x(n)

FMGA

OMGM

\(\|u^{*}-\tilde{u}_{n}\|_{1}\)

C.O.

\(\|u^{*}-\tilde {u}_{n}\|_{2}\)

C.O.

\(\|u^{*}-u_{n}\|_{1}\)

C.O.

\(\|u^{*}-u_{n}\| _{2}\)

C.O.

4

15

4.3753e-2

 

8.8248e-4

 

4.3753e-2

 

8.8244e-4

 

5

31

2.1963e-2

0.9943

2.2097e-4

1.9977

2.1963e-2

0.9943

2.2089e-4

1.9982

6

63

1.0992e-2

0.9986

5.5325e-5

1.9978

1.0992e-2

0.9986

5.5278e-5

1.9986

7

127

5.4975e-3

0.9996

1.3886e-5

1.9943

5.4975e-3

0.9996

1.3867e-5

1.9950

8

255

2.7489e-3

0.9999

3.4821e-6

1.9956

2.7489e-3

0.9999

3.4757e-6

1.9963

9

511

1.3745e-3

1.0000

8.7666e-7

1.9899

1.3745e-3

1.0000

8.7453e-7

1.9907

10

1023

6.8724e-3

1.0000

2.2071e-7

1.9899

6.8724e-3

1.0000

2.1997e-7

1.9912