The factorization problem—A survey

@article{Saeks1976TheFP,
  title={The factorization problem—A survey},
  author={R. Saeks},
  journal={Proceedings of the IEEE},
  year={1976},
  volume={64},
  pages={90-95}
}
  • R. Saeks
  • Published 1976 in Proceedings of the IEEE
The problem of factoring a positive Hermitian operator into the product of a causal operator and its adjoint is reviewed. Three classes of factorization are studied, miniphase factorization, regular factorization, and special factorzation. The former always exists, and a complete representation thereof is obtained in terms of the properties of reproducing kernel spaces. The regular factorization does not exist, in general, and its existence theroy is shown to be equivalent to the unitary… CONTINUE READING

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