A1+A2=1
A1->0.5A1
A2->A2+0.5A1
A2->0.5A2+0.25A1
A1->0.5A2+0.75A1

If stable : 0.5A2 = 0.25A1
A1 = 2A2

A1+A2=1
0.25A1-0.5A2=0

K11*a1+K12*a2+K13*a3+...=0
K21*a1+K22*a2+K23*a3+...=0
K31*a1+K32*a2+K33*a3+...=0
