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

1

1

1

Geometric

0

0

0

0

0

0

Moderate Geometric

1

1

1

1

0

0

Slow Geometric

6

7

6

5

4

3

Very slow Geometric

38

36

30

23

16

12

Equispaced

6

7

6

5

4

2

Densely Equispaced

38

36

30

22

16

12

Normal Distribution

2

5

5

6

6

7