REFERENCES
- ANDERSON , B. D. O. , 1967 , Quadratic Minimization, Positive Real Matrices and Spectral Factorization (submitted for publication) .
- ANDERSON , B. D. O. , and MOORE , J. B. , 1968 , Int. J. Control , 7 , 473 .
- ATHANS , M. , and FALB , P. L. 1966 , Optimal Control ( New York : McGraw-Hill ) .
- KALMAN , R. E. 1960 , Boln Soc. Mat. Mex. , p. 102 .
- SILVERMAN , L. M. , and ANDERSON , B. D. O. 1968 , J. SIAM Control , 6 (in the press) .
- †Communicated by Professor B. D. O. Anderson.