Matrix type

Number of iterations

$k=6$

$k=10$

$k=20$

$k=40$

$k=100$

$k=200$

Harmonic

0

0

0

1

1

2

Harmonic roots

0

0

1

2

1

3

Geometric

0

0

0

0

0

0

Moderate Geometric

2

2

2

3

1

1

Slow Geometric

9

10

11

15

6

8

Very slow Geometric

47

50

57

75

27

35

Equispaced

8

9

10

15

6

6

Densely Equispaced

47

50

56

76

25

32

Normal Distribution

3

8

8

12

9

18