A. x + b = 0 e.g.
Matrix A =
4
-1
-1
-1
0
4
0
0
0
4
-1
0
4
-1
0
-1
Vector x =
x1
x4
x2
x3
Vector b =
-5
-1
-2
-3
1.2
| This can be
written in an abbreviated form where for the cg-method A has the following
properties: |