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Nevanlinna-Pick interpolation by rational functions with a single pole inside the unit disk
Authors:Tengyao Wang  Joshua M. Weiss
Affiliation:
  • a Department of Mathematics, Princeton University, Princeton, NJ, USA
  • b Department of Mathematics, Haverford College, Haverford, PA, USA
  • Abstract:We devise an efficient algorithm that, given points z1,…,zk in the open unit disk D and a set of complex numbers {fi,0,fi,1,…,fi,ni−1} assigned to each zi, produces a rational function f with a single (multiple) pole in D, such that f is bounded on the unit circle by a predetermined positive number, and its Taylor expansion at zi has fi,0,fi,1,…,fi,ni−1 as its first ni coefficients.
    Keywords:65E05   30E05
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