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On sets of singular rotations for translation invariant differentiation bases formed by intervals

  • Giorgi Oniani EMAIL logo and Kakha Chubinidze
Published/Copyright: July 12, 2019
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Abstract

We study the dependence of differential properties of an indefinite integral on a rotation of the coordinate system. Namely, the following problem is studied: For a summable function f, what kind of a set may be the set of rotations θ for which f is not differentiable with respect to the θ-rotation of a given basis B? For translation invariant bases B formed by two-dimensional intervals, some classes of sets of singular rotations are found. In particular, for such bases with symmetric structure, a characterization of at most countable sets of singular rotations is found.

MSC 2010: 28A15

Award Identifier / Grant number: 217282

Funding statement: The first author was supported by the Shota Rustaveli National Science Foundation (Project no. 217282).

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Received: 2017-09-08
Accepted: 2017-11-28
Published Online: 2019-07-12
Published in Print: 2020-03-01

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