Two-State Spin System graph G=V,E)2 states {0,1 configuration V->10,1) contributions of local interactions: 0-0 weight: w(o)=contribution(e) e∈ETwo-State Spin System 2 states {0,1} configuration ￾ : V ￾ {0, 1} graph G=(V,E) contributions of local interactions: weight: w(￾) = ￾ e￾E KWV\ZQJ]\QWV(e) ￾ ￾ 1