Abstract
Abstract For certain classes of functions of Λ-bounded variation on [ - π , π ] {[-\pi,\pi]} , Waterman and D’Antonio constructed a sequence of summability kernels such that the corresponding integral means converge for any function from the class, but not for any function from a broader Λ ′ BV {\Lambda^{\prime}\mathrm{BV}} class. In our paper, we extend this result to the case of functions of two variables.
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