$r=3$

$r=5$

n

${\Vert f-Q_n^{r}f\Vert }_{L^2\left(\left[0,1\right]\right)}$

Cvge.

rate

${\Vert f-Q_n^{r}f\Vert }_{L^2\left(\left[0,1\right]\right)}$

Cvge.

rate

0

1.892549 × 10⁻³

6.173219 × 10⁻⁶

1

2.926195 × 10⁻⁴

2.69

2.017307 × 10⁻⁷

4.94

2

3.661579 × 10⁻⁵

3.00

6.285671 × 10⁻⁹

5.00

3

4.604027 × 10⁻⁶

2.99

1.953056 × 10⁻¹⁰

5.01

4

5.704865 × 10⁻⁷

3.01

6.150537 × 10⁻¹²

4.99

5

7.161416 × 10⁻⁸

2.99

1.905049 × 10⁻¹³

5.01