Linear systems having nonnegative least squares solution

References

• Ben-Israel , Adi and Greville , Thomas N. E. 1974 . Generalized Inverses:Theory and Applications , New York : John Wiley&Sons .
   Google Scholar
• Berman , A. and Plemmons , P. J. 1979 . Nonnegative Matrices in the Mathematical Sciences , New York. : Academic Press .
   Google Scholar
• Berman , A. and Plemmons , R.J. 1972 . SIAM J. Appl. Math. , 22 : 155 – 161 .
   Web of Science ®Google Scholar
• Berman , A. and Plemmons , R.J. 1974 . Inverses of nonnegative matrices . Linear and Multilinear Algebra , 2 : 161 – 172 .
   Google Scholar
• Egawa , Y. and Jain , S. K. 1982 . Nonnegative matrices Asuch that Ax= bhas nonnegative best approximate solution . SIAM J. Alg. Disc. Math. , 3 : 197 – 213 .
   Google Scholar
• Flor , P. 1969 . On groups of nonnegative matrices . Compositio Math. , 21 : 376 – 382 .
   Web of Science ®Google Scholar
• Jain , S. K. and Snyder , L. E. 1981 . Nonnegative λ-monotone matrices . SIAM J. Alg. Disc. Math. , 2 : 66 – 76 .
   Google Scholar