Imran Nasim, Michael E. Henderson
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.
Imran Nasim, Michael E. Henderson
Mathematics
Shu Tezuka
WSC 1991
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PRX Quantum
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Ergodic Theory and Dynamical Systems