Matrix type

Number of iterations

$k=6$

$k=10$

$k=20$

$k=40$

$k=100$

$k=200$

Harmonic

0

0

0

0

0

0

Harmonic roots

0

0

0

2

3

4

Geometric

0

0

0

0

0

0

Moderate Geometric

1

1

2

2

0

0

Slow Geometric

7

7

7

9

10

7

Very slow Geometric

38

35

34

26

33

30

Equispaced

6

7

7

9

8

5

Densely Equispaced

38

35

37

29

31

29

Normal Distribution

3

6

9

17

21

32