If Di < 0 for some subset J, we speak of a deficiency in the columns of J, i.e., a shortage of zero terms with the deficiency D'J = -Di > 0. Methods for deter- mining such deficient subsets are discussed in the section following. In the Matrix (2) of Table 3, we see J = {3, 5, 6} is deficient since I = {3, 4} and Di = 142 - 161 = - 19. To eliminate this deficiency, or at least to make it Smaller, we introduce additional zero terms. We determine, for a matrix C(r)