Nonlocal negative resistance and passivity ($P=\frac{g_0}{2}{\sum }_{ij}{T}_{ij}(V_i-V_j{)}^2\ge 0$)

For a balanced nonnegative transmission matrix and $I_i=g_0(N_i{V}_i-{\sum }_j{T}_{ij}{V}_j)$, electrical power obeyswith diagonal reflection included consistently or removed from both sides. A negative four-terminal voltage-to-current ratio is compatible with this positive total power because the measured voltage pair is not the current source's pair.