This work was financially supported by the Russian Science
Foundation, grant no. 22-11-00129
https://rscf.ru/en/project/22-11-00129/ at Lomonosov Moscow State University.
Citation:
E. D. Alferova, A. Yu. Popov, “Extremal positivity problem for integrals of sine series with monotone coefficients”, Mat. Zametki, 116:2 (2024), 316–320; Math. Notes, 116:2 (2024), 382–386