p = 6; n = 9; eps = .1;

% Incidence matrix
A = [-1 +1  0  0  0  0  0  0 -1;
     +1  0 -1  0  0  0  0 -1  0;
      0 +1 +1 -1  0  0  0  0  0;
      0  0  0 +1 -1 -1  0  0  0;
      0  0  0  0 +1  0 +1  0 +1;
      0  0  0  0  0 +1 -1 +1  0];

% Source rates
s = [1;0;0;0;-1;0];
t = [0;1;0;0;0;-1];