Blaschke product interpolation and its application to the design of digital filters
A new proof is given that n distinct points on the unit circle can be mapped into n arbitrary points on the circle of the complex plane by a finite Blaschke product. A result of this proof is that the mapping can be done with at most n-1 factors in the product. The problem is studied in the context of its application to frequence transformations used to design digital filters.
scientific article; zbMATH DE number 4032277