TY - JOUR AU - V. G. Doronin AU - A. A. Ligun AU - A. S. Serdyuk AU - A. L. Shydlich PY - 2009/01/25 Y2 - 2024/03/29 TI - Exact constants in Jackson-type inequalities for $L_2$-approximation on an axis JF - Ukrains’kyi Matematychnyi Zhurnal JA - Ukr. Mat. Zhurn. VL - 61 IS - 1 SE - Research articles DO - UR - https://umj.imath.kiev.ua/index.php/umj/article/view/3005 AB - We investigate exact constants in Jackson-type inequalities in the space $L_2$ for the approximation of functions on an axis by the subspace of entire functions of exponential type. ER -