. Early geophysical papers of the Society of Exploration Geophysicists . Fig. da If in the network of triangles actually under consideration there are third-remove triangles, or triangles of still greater remoteness from the key triangle for which approximation is desired, there will be residual correlates, m3\, tn32, â ⢠⢠, introduced into equations of type (19) and (20). There is no difficulty in finding series of multipliers to carry the elimination to further stages, especially if the cells are

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