The product form for the inverse in the simplex method
George B. Dantzig, Wm. Orchard-Hays · Mathematics of Computation · 1954
From the theory of such equations, we find that for large i : ■ Qt = a{h(K + [4 + K2y)}< Now it is easily seen that the error in any approximation Pí/Qí is of the order of (Qi)~2 and therefore, per average cycle, the error should decrease by a factor of 4{K + (4 + K2)*}~2 = 1/9.1 or approximately one decimal place.