On explicit Wiener-Hopf factorization of 2 × 2 matrices in a vicinity of a given matrix

L. Ephremidze, I. Spitkovsky

Research output: Contribution to journalArticlepeer-review


As it is known, the existence of the Wiener-Hopf factorization for a given matrix is a well-studied problem. Severe difficulties arise, however, when one needs to compute the factors approximately and obtain the partial indices. This problem is very important in various engineering applications and, therefore, remains to be subject of intensive investigations. In the present paper, we approximate a given matrix function and then explicitly factorize the approximation regardless of whether it has stable partial indices. For this reason, a technique developed in the Janashia-Lagvilava matrix spectral factorization method is applied. Numerical simulations illustrate our ideas in simple situations that demonstrate the potential of the method.

Original languageEnglish (US)
Article number20200027
JournalProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Issue number2238
StatePublished - 2020


  • Janashia-Lagvilava method
  • Wiener-Hopf factorization
  • matrix spectral factorization
  • partial indices

ASJC Scopus subject areas

  • General Mathematics
  • General Engineering
  • General Physics and Astronomy


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