Concave shells of continuity modules von S. A. Pichugov

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Marshoud's inequality for multiple modules of continuity in metric spaces von S. A. Pichugov

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Nikol'skii–Stechkin-type inequalities for the increments of trigonometric polynomials in metric spaces von S. A. Pichugov

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Some properties of the moduli of continuity of periodic functions in metric spaces von S. A. Pichugov

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