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Ніна Опанасівна Вірченко (до 90-річчя від дня народження)
The article is devoted to the 90th anniversary of famous Ukrainian scientist. We are talking about professor of mathematics Nina Virchenko. We cover her tough life journey, scientific, educationalExpand
On the Lebesgue Inequality on Classes of $ \bar{\psi} $ -Differentiable Functions
We consider the deviations of Fourier sums in the spaces $ {C^{\bar{\psi}}} $. The estimates of these deviations are expressed via the best approximations of the $ \bar{\psi} $ -derivatives ofExpand
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