M. Tismenetsky
International Journal of Computer Mathematics
The problem of factoring positive operators into an "outer" factor and its adjoint has been studied, and its application to the theory of non-stationary random processes is discussed. This problem is an extension of the classical one of factoring positive matrix-valued functions defined on the unit circle of the complex plane into similar factors. © 1971.
M. Tismenetsky
International Journal of Computer Mathematics
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989
Corneliu Constantinescu
SPIE Optical Engineering + Applications 2009
Y.Y. Li, K.S. Leung, et al.
J Combin Optim