The disjoint union of a family of pairwise disjoint sets is their set union. Let formula 92, where all the sets formula 93 are pairwise disjoint. For each "n", 20 pairwise almost orthogonal chains where constructed numerically for each dimension. It uses multiple scatter plots to represent a pairwise relation among variables. It is closely related to pairwise string alignments. It immediately follows that all adjacent faces are pairwise orthogonal. MSAs require more sophisticated methodologies than pairwise alignment because they are more computationally complex. Sedgewick recommends to use gaps that have low greatest common divisors or are pairwise coprime. As the formula 19 are pairwise coprime, formula 27 and formula 19 are coprime. Conceptually, sparsity corresponds to systems with few pairwise interactions. Clearly, these pairs are pairwise different. The procedure consists of a series of pairwise comparisons between means. The simplest such fall-back methods involve entirely disregarding the results of the pairwise comparisons. Then the decision-maker evaluates the relative importance of its various elements by pairwise comparisons. Their method was a general one, which considered all kinds of pairwise comparisons.