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Approximation and transfer of properties between net-type and translation invariant convex differentiation bases

Volume 176 / 2024

Giorgi Oniani Colloquium Mathematicum 176 (2024), 159-170 MSC: Primary 28A15; Secondary 42B25 DOI: 10.4064/cm9355-10-2024 Published online: 4 November 2024

Abstract

Let $\mathbf B$ be a net-type convex differentation basis and $\mathbf H$ be a translation invariant convex differentation basis. We show the transfer of differentiation properties for non-negative functions from $\mathbf B$ to $\mathbf H$ provided $\mathbf B$ is a subbasis of some translation invariant density basis and each set $H$ forming $\mathbf H$ can be approximated by some set $B$ forming $\mathbf B$ in the sense that $| B\triangle H|\leq c | B\cap H|$, where $c$ is a positive constant not depending on $H$. Some applications for net-type bases formed by rectangles with dyadic type constraints are given.

Authors

  • Giorgi OnianiSchool of Mathematics
    Kutaisi International University
    Kutaisi 4600, Georgia
    e-mail

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