Abstract
The Schur algorithm as developed by C. Chamfy [C] and J. Dufresnoy [D] (see also [BDGPS]) is related to a sequence of characteristic functions of closely outerconnected coisometric colligations in Pontryagin spaces.
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Alpay, D., Azizov, T., Dijksma, A., Langer, H. (2001). The Schur algorithm for generalized Schur functions I: coisometric realizations. In: Borichev, A.A., Nikolski, N.K. (eds) Systems, Approximation, Singular Integral Operators, and Related Topics. Operator Theory: Advances and Applications, vol 129. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8362-7_1
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