From: An augmented Lagrangian method for the Signorini boundary value problem with BEM
N = 40
N = 80
N = 160
N = 320
N = 640
ρ = 100
48
47
46
ρ = 101
15
16
ρ = 102
9
10
11
ρ = 103
8
ρ = 104
7
ρ = 105
6