
SVD AND SIGNAL PROCESSING, III
Algorithms, Architectures and Applications
M. Moonen and B. De Moor (Editors)
9 1995 Elsevier Science B.V. All rights reserved.
209
J-UNITARY MATRICES FOR ALGEBRAIC APPROXIMATION AND
INTERPOLATION- THE SINGULAR CASE
P. DEWILDE
DIMES, Delft University of Technology
POB 5031, 2600GA Delft
The Netherlands
P. Dewilde @cas. et. tudelft, nl
ABSTRACT. The teachability space of J-unitary or symplectic matrices plays a crucial role
in the theory of constrained interpolation and approximation of matrices and operators. For
the standard solution to exist, it is necessary that the Pick operator ...