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JOURNALS // Ufimskii Matematicheskii Zhurnal // Archive

Ufimsk. Mat. Zh., 2025 Volume 17, Issue 3, Pages 100–112 (Mi ufa742)

On multiple interpolation of periodic complex–valued functions

A. I. Fedotov

Kazan National Research Technical University named after A. N. Tupolev, Karl Marx str. 10, 420111, Kazan, Russia

Abstract: We obtain fully constructive results on construction of trigonometric interpolation polynomials with multiple nodes. We construct polynomials interpolating periodic complex–valued functions of a real variable. The polynomials are represented in general form and in the form of expansions over fundamental polynomials. We provide examples and discuss unresolved problems.

Keywords: multiple interpolation, complex–valued functions.

MSC: 65D05

Received: 14.09.2024

Language: English


 English version:
Ufa Mathematical Journal, 2025, 17:3, 96–108


© Steklov Math. Inst. of RAS, 2026