Exterior products of operators and superoptimal analytic approximation
arXiv:2004.06415
Abstract
We give a new algorithm for the construction of the unique superoptimal analytic approximant of a given continuous matrix-valued function on the unit circle, making use of exterior powers of operators in preference to spectral or {\em Wiener-Masani} factorizations.
118 pages. This version includes minor revisions. It has been accepted for publication by the Transactions of the London Mathematical Society