Criteria for transforming a Z-matrix into an M-matrix
József Abaffy, Marida Bertocchi, Anna Torrier · Optimization methods & software · 1992
A characterization of M-matrices is given by means of a special algorithm in the ABS class for linear systems. The effects of changes in the entries of the coefficient matrix are investigated. An application to the classical static Leontief and Sraffa input- output economic model is presented together with numerical results on a real case using an IBM 3090 200VF.