Jonathan Ashley, Brian Marcus, et al.
Ergodic Theory and Dynamical Systems
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.
Jonathan Ashley, Brian Marcus, et al.
Ergodic Theory and Dynamical Systems
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SPIE Photomask Technology + EUV Lithography 2009
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IEEE Transactions on Pattern Analysis and Machine Intelligence
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SPIE Optical Science, Engineering, and Instrumentation 1998