Am I right in thinking that a feedback equation such as A1 = (A +/- B2) is infinite, where A is continually feeding back to A1 new information from the sum of (A +/- B)? If (A1 = A) alone then it is a stable system. When the additional external +/- B2 is added, calculated and fedback, its effect on the stable system will slowly change it over time. From the point +/- B2 is added, would the stable system try to maintain its equilibrium at its original 0 value to maintain energy efficiency at 0?