Geodesic
Extension of the lower Telyakovskii estimate for the sum of a sine-series with convex coefficient sequence to a longer segment
Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 4 (2024), pp. 26-32

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The lower estimate of the sum of a sine series with a convex sequence of coefficients obtained by S. A. Telyakovskiĭ is extended to a much longer segment. 
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     title = {Extension of the lower {Telyakovskii} estimate for the sum of a sine-series with convex coefficient sequence to a longer segment},
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A. Yu. Popov; A. P. Solodov. Extension of the lower Telyakovskii estimate for the sum of a sine-series with convex coefficient sequence to a longer segment. Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 4 (2024), pp. 26-32. http://geodesic.mathdoc.fr/item/VMUMM_2024_4_a3/