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Unconditionality of periodic orthonormal spline systems in $L^p$

Volume 248 / 2019

Karen Keryan, Markus Passenbrunner Studia Mathematica 248 (2019), 57-91 MSC: 42C10, 46E30. DOI: 10.4064/sm171011-28-3 Published online: 22 February 2019


Given any natural number $k$ and any dense point sequence $(t_n)$ on the torus $\mathbb T$, we prove that the corresponding periodic orthonormal spline system of order $k$ is an unconditional basis in $L^p$ for $1 \lt p \lt \infty $.


  • Karen KeryanYerevan State University
    Alex Manoogian St. 1
    0025, Yerevan, Armenia
    American University of Armenia
    Marshal Baghramyan St. 40
    0019, Yerevan, Armenia
  • Markus PassenbrunnerInstitute of Analysis
    Johannes Kepler University Linz
    Altenberger Strasse 69
    4040 Linz, Austria

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