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Theory and Modern Applications

Table 2 The \(L_{\infty }\), \(L_{2}\) errors and spatial convergence orders with \(\tau = 1/1000\) for Example 1

From: A high-order numerical scheme using orthogonal spline collocation for solving the two-dimensional fractional reaction–subdiffusion equation

α

h

\(L_{\infty }\) error

Convergence order

\(L_{2}\) error

Convergence order

0.1

\(\frac{1}{10}\)

3.4339e−006

 

2.5064e−006

 

\(\frac{1}{20}\)

2.1541e−007

3.9947

1.5705e−007

3.9963

\(\frac{1}{40}\)

1.3497e−008

3.9964

9.8209e−009

3.9992

\(\frac{1}{80}\)

8.4315e−010

4.0007

6.1352e−010

4.0007

0.3

\(\frac{1}{10}\)

3.1758e−006

 

2.3248e−006

 

\(\frac{1}{20}\)

1.9975e−007

3.9909

1.4568e−007

3.9962

\(\frac{1}{40}\)

1.2499e−008

3.9983

9.1095e−009

3.9993

\(\frac{1}{80}\)

7.7988e−010

4.0024

5.6827e−010

4.0027

0.5

\(\frac{1}{10}\)

2.8749e−006

 

2.1134e−006

 

\(\frac{1}{20}\)

1.8151e−007

3.9854

1.3245e−007

3.9960

\(\frac{1}{40}\)

1.1350e−008

3.9993

8.2822e−009

3.9993

\(\frac{1}{80}\)

7.0704e−010

4.0048

5.1598e−010

4.0046

0.7

\(\frac{1}{10}\)

2.5405e−006

 

1.8696e−006

 

\(\frac{1}{20}\)

1.6044e−007

3.9850

1.172e−007

3.9957

\(\frac{1}{40}\)

1.0032e−008

3.9994

7.3288e−009

3.9993

\(\frac{1}{80}\)

6.2455e−010

4.0056

4.5634e−010

4.0054

0.9

\(\frac{1}{10}\)

2.1719e−006

 

1.5897e−006

 

\(\frac{1}{20}\)

1.3618e−007

3.9954

9.9689e−008

3.9952

\(\frac{1}{40}\)

8.5366e−009

3.9957

6.2348e−009

3.9990

\(\frac{1}{80}\)

5.3234e−010

4.0032

3.8885e−010

4.0031

0.98

\(\frac{1}{10}\)

2.0086e−006

 

1.4663e−006

 

\(\frac{1}{20}\)

1.2597e−007

3.9950

9.1972e−008

3.9948

\(\frac{1}{40}\)

7.8801e−009

3.9987

5.7531e−009

3.9988

\(\frac{1}{80}\)

4.9259e−010

3.9998

3.5943e−010

4.0006