Interpolation Through Approximation in a Bernstein Space
- Authors: Shirokov N.A.1
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Affiliations:
- St.Petersburg State University and High School of Economics
- Issue: Vol 243, No 6 (2019)
- Pages: 965-980
- Section: Article
- URL: https://journals.rcsi.science/1072-3374/article/view/243194
- DOI: https://doi.org/10.1007/s10958-019-04597-z
- ID: 243194
Cite item
Abstract
Let Bσ be the Bernstein space of entire functions of exponential type at most σ bounded on the real axis. Consider a sequence Λ = {zn}n∈ℤ, zn = xn + iyn, such that xn+1 − xn ≥ l > 0 and |yn| ≤ L, n ∈ ℤ. Using approximation by functions from Bσ, we prove that for any bounded sequence A = {an}n∈ℤ, |an| ≤ M, n ∈ ℤ, there exists a function f ∈ Bσ with σ ≤ σ0(l,L) such that f|Λ = A.
About the authors
N. A. Shirokov
St.Petersburg State University and High School of Economics
Author for correspondence.
Email: nikolai.shirokov@gmail.com
Russian Federation, St.Petersburg