where ff = [z‘:w‘],rER and S = i2$<', F=A22-SA12, G = A2,SAU, Ai=[An:A}2\, ~,,ER . Other matrices are compatibly dimensioned. Again it should be noted that the dimension of the partitions in the matrices are not the same as in (1). Equation @I) represents an underdetermined set of (n — m) equations in n unknowns, and thus m entries in each eigenvector corresponding to z-vector can be arbitraril...