Erratum to: “Coefficients of multiple Fourier-Haar series and variational modulus of continuity” [Bulletin of the Karaganda University. Mathematics series, No. 4(112), 2023, pp. 21–29]

Abstract

Prof. Tuncay Aktosun requests retraction of his co-authorship for the following reason. Prof. Tuncay Aktosun has not been involved in the publication process and has not participated in any discussions, therefore, he cannot hold responsibility for any results in the published paper.