Matthew A Grayson
Journal of Complexity
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.
Matthew A Grayson
Journal of Complexity
Corneliu Constantinescu
SPIE Optical Engineering + Applications 2009
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IEEE International Symposium on Information Theory - Proceedings