A general approach to multivariable recursive interpolation

نویسندگان

چکیده

Abstract We consider here the problem of constructing a general recursive algorithm to interpolate given set data with rational function. While many algorithms this kind already exist, they are either providing non-minimal degree solutions (like Schur algorithm) or exhibit jumps in interpolants (or partial realization, as is called when interpolation at infinity, see Rissanen (SIAM J Control 9(3):420–430, 1971) and Gragg Lindquist (in: Linear systems control (special issue), linear algebra its applications, vol 50. pp 277–319, 1983)). By imbedding solution into larger interpolants, we show that increase representation proportional length data. provide an multivariable tangential sets arbitrary nodes, generalizing fundamental manner results Kuijper (Syst Lett 31:225–233, 1997). use new approach discuss special scalar case detail. When obtained from Taylor-series expansion function, then Euclidean-type plays important role.

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ژورنال

عنوان ژورنال: Mathematics of Control, Signals, and Systems

سال: 2021

ISSN: ['0932-4194', '1435-568X']

DOI: https://doi.org/10.1007/s00498-020-00274-8