Continuum cardinality of the set of solutions of one class of equations that contain the function of frequency of ternary digits of a number von Kotova, O. V., Котова, О. В.

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A New Sufficient Condition for Belonging to the Algebra of Absolutely Convergent Fourier Integrals and Its Application to the Problems of Summability of Double Fourier Series von Kotova, O. V., Trigub, R. M., Котова, О. В., Тригуб, Р. М., Котова, О. В., Тригуб, Р. М.

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Exact order of approximation of periodic functions by one nonclassical method of summation of Fourier series von Kotova, O. V., Trigub, R. M., Котова, О. В., Тригуб, Р. М., Котова, О. В., Тригуб, Р. М.

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