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Theory and Modern Applications

Table 3 Maximum absolute error of \(\pmb{|y-y_{N}|}\) for Example 2 for \(\pmb{N=2,4,6,8,10,12}\)

From: A new generalized Jacobi Galerkin operational matrix of derivatives: two algorithms for solving fourth-order boundary value problems

N

\(\boldsymbol {E_{1}}\)

\(\boldsymbol {E_{2}}\)

\(\boldsymbol {E_{3}}\)

\(\boldsymbol {E_{4}}\)

2

1.36037 × 10−6

2.11456 × 10−6

8.70645 × 10−7

8.46647 × 10−8

4

1.23719 × 10−8

2.69013 × 10−8

5.15533 × 10−9

5.83994 × 10−10

6

4.34874 × 10−11

1.19637 × 10−10

1.93656 × 10−11

4.17821 × 10−12

8

2.65565 × 10−13

4.8217 × 10−13

1.57874 × 10−13

3.44169 × 10−14

10

9.10383 × 10−15

9.76996 × 10−15

1.19904 × 10−14

8.88178 × 10−15

12

8.65974 × 10−15

8.65974 × 10−15

1.06581 × 10−14

8.43769 × 10−15