A Connection between Szegö and Nehari Sequences in the Matrix-valued Case Academic Article uri icon


  • One can associate to a rational function which is moreover strictly positive on the unit circle two sequences of numbers in the open unit disk, called the Szegö sequence and the Nehari sequence. In the scalar case, they coincide up to multiplication by −1. We study the corresponding result in the matrix-valued case.

publication date

  • January 1, 2008