From: Investigation of the existence and uniqueness of extremal and positive definite solutions of nonlinear matrix equations
α
k
tol = 10−6
tol = 10−8
tol = 10−10
1.2
8
20
31
1.4
10
22
33
1.6
11
23
34
1.8
12
24
35
2
13
25
36