\(J_{\ell}\)-unitary factorization and the Schur algorithm for Nevanlinna functions in an indefinite setting
In this important paper, the authors introduce for the first time a Schur transformation for generalized Nevanlinna functions and show that it can be used in obtaining the unique minimal factorization of a class of rational \(J\)-unitary matrix functions into elementary factors from the same class.
scientific article; zbMATH DE number 5126038
scientific article